Preheat oven to 450F/230c.
Place the caps onto the lightly greased baking sheet. Bake for 15-20 minutes until the tops become browned and the portobello mushrooms has slightly softened.
Mix the tuna with the black pepper, garlic powder, dill (optional) with the capers in a bowl, ready for stuffing into the portobello mushrooms.
Remove the mushrooms from the oven and fill with the tuna mixture and then top with the sliced avocado and serve.
0 servings