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Mediterranean Fish Sandwichwith Psyllium Bread Substitute

Recipe by andreapontc on InstagramAdded 8 August 2026.

20 minutes to prep, 15 to cook. A fresh, gluten‑free Mediterranean sandwich that captures the flavors of sunny Menorca. The airy psyllium bread pairs perfectly with a zesty tuna and olive filling, making for a light yet protein‑rich lunch that’s quick to assemble.

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Method

  1. Whisk the egg whites until stiff peaks form.

  2. Add the egg yolk and fold gently into the whites.

  3. Stir in the psyllium husk that has been mixed with water until a batter forms.

  4. Pour the batter into a greased baking pan and bake at 350°F (350°F) for 15 minutes until firm.

  5. While the batter bakes, prepare the filling by mixing lettuce, tuna, pickles, capers, olives, tomato, mayonnaise, salt, and pepper in a bowl.

    Kitchen notes · Added by ReelsMeals: The filling is evenly mixed and holds together. Keep the lettuce chopped small enough to fit the sandwich.

  6. Once the bread substitute is baked and cooled, slice it into sandwich-sized portions.

  7. Spread the prepared filling onto the bread slices and serve immediately.

Tips while you cook

Whisk whites first
Whisk the egg whites until stiff peaks form before adding the yolk.
Prepare psyllium mixture
Mix the psyllium husk with water beforehand, then stir it into the egg mixture.
Grease the pan
Grease the baking pan before pouring the batter.
Cool before slicing
Allow the baked bread substitute to cool before slicing into sandwich portions.

Notes from ReelsMeals, based on this recipe's ingredients, times and method. They are not the creator's instructions.

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The recipe comes from andreapontc’s Instagram reel. ReelsMeals wrote it down from the caption and the voiceover. Check the original if something looks off, and for anything about allergens.

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