The necessary ingredients are puff pastry, canned tuna, sour cream, onions, capers, parsley, salt, pepper, and an egg yolk for brushing.

Start by preheating your oven. Then, in the Thermomix bowl, mix the drained tuna, sour cream, sliced onions, capers, parsley, salt, and pepper. Roll out the puff pastry and cut into squares. Place a tablespoon of the tuna mixture in the center of each square, then fold the corners to form a turnover. Brush the pastries with beaten egg yolk and bake until golden and crispy.

Yes, you can use fresh tuna if you prefer. Make sure to steam or poach it before flaking and incorporating it into the mixture.

Yes, you can add other ingredients to personalize the recipe to your taste. For example, you can incorporate sautéed peppers or mushrooms, or add grated cheese for extra flavor.

No, it is not necessary to pre-bake the puff pastry before filling it. It will bake during the cooking process and become crispy and golden.

Yes, you can freeze the tuna puff pastry before baking. Place them on a baking sheet lined with parchment paper, then put them in the freezer for about 1 hour. Once frozen, transfer them to a freezer bag and store them in the freezer until you're ready to bake them. Just add a few extra minutes of baking time when cooking.

The baking time may vary depending on your oven, but generally, the tuna puff pastry should bake for about 15 to 20 minutes, or until golden and crispy.

Yes, you can serve these tuna puff pastries as an appetizer, an entrée, or even a main course accompanied by a green salad. They are versatile and delicious at any time of the day.

Yes, you can reheat leftover tuna puff pastries in the oven at a moderate temperature for a few minutes until they are hot and crispy again.