Baked Avocado Tuna Mayo Gratin
Transform simple ingredients into a rich, satisfying low-carb meal. Creamy avocado and savory tuna are combined with a hint of miso, then baked under golden melted cheese.
Replacing high-carb staples with nutrient-dense avocado transforms this comforting gratin into an ideal meal for those watching their carbohydrate intake. The natural creaminess of the avocado pairs perfectly with the savory, protein-packed tuna and a subtle umami depth from the miso paste. Baked under a bubbling layer of mozzarella cheese, it’s a foolproof, beginner-friendly recipe that comes together beautifully in either an oven or an air fryer.
Ingredients
- 1 whole avocado
- 1 can canned tuna, drained
- 2 tbsp mayonnaise
- 1 tsp miso paste
- 1 tbsp lemon juice
- 1/4 cup shredded mozzarella cheese
- to taste black pepper
- optional fresh parsley, chopped
- optional red pepper flakes
Instructions
- 1Scoop out the avocado
Remove the avocado pit using a spoon and scoop out the green flesh into a glass bowl.
Tip: Use a spoon carefully to avoid piercing the avocado skin, as you will need intact shells to act as boats for the gratin. - 2Add lemon juice
Squeeze fresh lemon juice over the diced avocado in the glass bowl to prevent browning and add brightness.
Tip: Lemon juice also enhances the natural flavor of the avocado. - 3Mix with tuna and seasonings
Add canned tuna, mayonnaise, miso paste, and black pepper into the bowl with the avocado, then mix well.
Tip: Miso paste adds a subtle umami depth that elevates the standard tuna mayo flavor. - 4Refill the avocado skins
Spoon the prepared avocado and tuna mixture back into the hollowed-out avocado skins to create boats for baking.
Tip: Pack the mixture in firmly so it holds its shape. At this stage, the boats are ready to be topped with shredded cheese and baked.
