Wash and dry the mushrooms. Remove chaff and fat from chicken fillet and wash. Wash the greens and dry.
Cut the mushrooms and chicken breast into small pieces and fry in a preheated frying pan with vegetable oil, stir. Fry until done.
Grind the processed cheese on a grater and add ketchup to it. Stir. In a bowl, combine chicken breast and mushrooms, melted cheese and ketchup. Add chopped parsley, salt and ground black pepper to taste and mix again.
Place the puff pastry on a floured surface and roll out the dough. Cut out 10-12 triangles from it and arrange them in a round shape in the shape of a flower. There should be an open circle in the center. To prevent the filling from getting into it, place the glass or cup upside down. Place finely grated hard cheese on the dough in a circle as the first layer.
Place the filling of chicken, mushrooms and herbs on top of the cheese. Cover the filling with the “petals” of the dough, securing the corners. Brush the pie with beaten egg and place in the oven for 30-35 minutes at 180 degrees.
Serve the pie in portions. Garnish with basil or parsley. Place slices of tomato or halves of fried mushrooms around.