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Healthy Breakfast Ideas –

Mackerel & Guacamole on Toast

Written By: Byron | March 1, 2025
A plate of Spanish mackerel and guacamole on toast.

Step up your breakfast game with these healthy breakfast ideas from the Mediterranean and one of our favorite breakfast recipes. Mackerel & Guacamole on Toast. 

Lightly toasted brown bread, a quick and easy guacamole with fresh tomato, avocado, and a little red onion, and everything combined with just a splash of extra virgin olive oil and some Jerez sherry vinegar. Top off your toast with a few fillets of mackerel and you’ve got a healthy and hassle-free breakfast ready in under 5 minutes

This recipe is loaded with goodness and requires virtually no cooking, just toast the bread, load it with toppings, and you’re good to go! 

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Serving:

Breakfast for 2-3

Ready in:

5 minutes

Skill level:

Easy

Serve with:

Fresh coffee or juice

Watch step-by-step recipe video

If you’re looking for this recipe’s video and many other great recipe ideas, why not check out our Spanish Radish YouTube Channel? We’ve got everything from quick and easy tapas recipes to delicious main meals, to incredible Spanish dessert options too.

How to Make Mackerel and Guacamole on Toast

Ingredients

  • A few slices of bread (we used brown wholemeal bread)
  • 1 small tin of Mackerel in olive oil
  • 1-2 ripe Roma tomatoes, diced
  • 1 ripe avocado, diced
  • ½ red onion, diced fine
  • Extra virgin olive oil (or use the Mackerel oil if you prefer)
  • 1 tsp Jerez Sherry Vinegar
  • Salt and Pepper (to taste)
  • Fresh parsley (for garnish)

Equipment

      Ingredients used to make Spanish mackerel and guacamole on toast

      Step-by-Step Instructions

      Toast Bread

      • Lightly toast bread using a toaster or oven grill. For the oven grill, around 2 minutes, 45 seconds is plenty. 

      Make guacamole

      • In a small bowl, add the diced red onion, avocado, and tomato. 
      • Add the Jerez sherry vinegar and some olive oil. 
      • Mix well and season to taste with a little salt and pepper. 

      Load up bread with toppings and serve

      • Load up the bread with some of the guacamole, then top with a few small fillets of mackerel.
      • Garnish with some fresh chopped parsley, and serve!
      A plate of Spanish mackerel and guacamole on toast.

      Best Mackerel to Use

      We used Caballa del Sur which is Spanish for “Mackerel of the South.” But you can use any good quality canned mackerel, just ensure it has been preserved in olive oil (not sunflower oil). 

      Here are a few suggestions:

      What is Caballa del Sur

      “Caballa del Sur” refers to a specific type of Atlantic mackerel (Scomber colias or Scomber japonicus) found in the southern waters of Spain, particularly in the Andalusia Region and Mediterranean regions.

      In Spain, Caballa del Sur is prized for its firm texture and rich, oily flavor. It’s often prepared grilled, canned in olive oil, or used in traditional Andalusian dishes. Cádiz and Málaga are well-known for their high-quality Caballa del Sur, and it often carries a Protected Geographical Indication (PGI) status, ensuring its quality and origin. 

      Is Mackerel Healthy?

      Mackerel is very healthy and is considered one of the best fish for nutrition. It is a firm staple of the Mediterranean diet and is used in Mediterranean cuisine in fresh or canned form. Here’s a few reasons why Mackerel is considered so healthy:

      Health Benefits of Mackerel

      Rich in Omega-3 Fatty Acids – Great for heart health, reducing inflammation, and supporting brain function.
      High in Protein – Helps build and repair muscles.
      Packed with Vitamins & Minerals – Includes B12 (for energy & brain health), vitamin D (for bones & immunity), and selenium (a powerful antioxidant).
      Good for Heart Health – Helps lower bad cholesterol (LDL) and raise good cholesterol (HDL).
      Supports Brain Function – Omega-3s in mackerel are linked to better cognitive health and reduced risk of dementia.
      Low in Mercury – Compared to larger fish like tuna, mackerel (especially Atlantic or Spanish mackerel) has lower mercury levels.

      Things to Keep in Mind

      🔸 Watch the sodium – Canned mackerel can be high in salt. Choose low-sodium options if possible.
      🔸 Avoid King Mackerel – This variety has high mercury levels and should be eaten in moderation, especially for pregnant women and children.

          A plate of Spanish mackerel and guacamole on toast.

          Guacamole – Spanish Style!

          We use the term ‘guacamole’ loosely and with utmost respect for the Latin American dish. For lack of a better way to describe it, our ‘Spanish style guacamole is made with similar ingredients (tomato, avocado, onion, oil, and vinegar (acid), but we prepare it slightly differently. 

          Instead of turning everything into a paste, we dice the ingredients and loosely toss them in a bowl with the lightest of dressing and a touch of seasoning. We have listed extra virgin olive oil for the guac, however, you could use the oil from the Mackerel if it’s good enough quality.

          Nutrition Facts

          Servings: 3

          Amount per serving

           

          Calories

          295

          % Daily Value*

          Total Fat 19.8g

          25%

          Saturated Fat 3g

          15%

          Cholesterol 0mg

          0%

          Sodium 177mg

          8%

          Total Carbohydrate 22.9g

          8%

          Dietary Fiber 7.3g

          26%

          Total Sugars 4.5g

           

          Protein 9g

           

          Vitamin D 0mcg

          0%

          Calcium 53mg

          4%

          Iron 2mg

          8%

          Potassium 506mg

          11%

          *The % Daily Value (DV) tells you how much a nutrient in a food serving contributes to a daily diet. 2,000 calorie a day is used for general nutrition advice.

              A plate of Spanish mackerel and guacamole on toast.

              Healthy Breakfast Ideas - Mackerel & Guacamole on Toast

              Byron
              Step up your breakfast game with these healthy breakfast ideas from the Mediterranean and one of our favorite breakfast recipes: Mackerel & Guacamole on Toast.
              Prep Time 2 minutes
              Cook Time 3 minutes
              Total Time 5 minutes
              Course Breakfast, Snack
              Cuisine latin american, Mediterranean, Spain
              Servings 3 Breakfast
              Calories 295 kcal

              Equipment

              • Oven with grill function
              • Oven rack
              • small bowl
              • Wooden cutting board
              • Chef knife

              Ingredients

              • A few slices of bread we used brown wholemeal bread
              • 1 small tin of Mackerel in olive oil
              • 1-2 ripe Roma tomatoes diced
              • 1 ripe avocado diced
              • ½ red onion diced fine
              • Extra virgin olive oil or use the Mackerel oil if you prefer
              • 1 tsp Jerez Sherry Vinegar
              • Salt and Pepper to taste
              • Fresh parsley for garnish

              Instructions
               

              Toast Bread

              • Lightly toast bread using a toaster or oven grill. For the oven grill, around 2 minutes, 45 seconds is plenty.
                A few slices of bread

              Make guacamole

              • In a small bowl, add the diced red onion, avocado, and tomato.
                1-2 ripe Roma tomatoes, 1 ripe avocado, ½ red onion
              • Add the Jerez sherry vinegar and some olive oil.
                1 tsp Jerez Sherry Vinegar, Extra virgin olive oil
              • Mix well and season to taste with a little salt and pepper.
                Salt and Pepper

              Load up bread with toppings and serve

              • Load up the bread with some of the guacamole, then top with a few small fillets of mackerel.
                1 small tin of Mackerel in olive oil
              • Garnish with some fresh chopped parsley, and serve!
                Fresh parsley

              Video

              Keyword 5 minute breakfast, 5-minute recipe, 7 grain bread, avocado, bread, guacamole, healthy, healthy breakfast, healthy breakfast ideas, healthy fish, mackerel, oily fish, spanish mackerel, toast

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              A plate of Spanish mackerel and guacamole on toast.