Boil the eggs and cut into small cubes. Peel the onion and cut into the same cubes. Rinse the rice several times until the water runs clear. Crumble the tuna with a fork and place in a separate container. Sift the flour into a separate bowl and mix with yeast, salt and sugar.
Prepare the dough. To do this, add warm milk and sunflower oil to the flour mixture. Knead into an elastic dough. Grease the dough with vegetable oil so that it does not stick to your hands. Cover with cling film and leave to rise for 1 hour in a warm place.
While the dough is resting, make the filling. Boil the rice in salted water and fry the onion over medium heat until tender. Mix boiled eggs in a separate container with tuna, rice and onions. Add mayonnaise, salt and pepper to taste and mix everything well.
When the dough has risen, place it on the work surface, sprinkle the dough with flour and divide into small equal parts. Roll out each part thinly, place the filling in the middle, seal the edges of the dough and form a pie. Place each pie on a baking sheet and bake in the oven until done, about 30 minutes or until crispy.
After cooking the pies, leave them on a wire rack until they cool. Then place them on a large, beautiful plate next to each other. Cut tomato slices and decorate the dish with them. Also take any aromatic herbs and place them on the side. Brew tea and serve it with baked goods.