Seafood and Cheese Baked Rice

4 servings. Cut the mushrooms into thin slices and the bacon into very thin slices. Heat 30g butter and olive oil in a frying pan. Add the mushrooms and bacon and fry together. Add the cooked rice, making sure it does not stick, then flavor with salt and pepper. Add the minced parsley. In a separate frying pan, melt butter to taste. Fry the minced onions without burning them. Add heated white sauce and mix thoroughly. Fry the shrimp, whitefish and scallops separately, then cut into random sizes. Grease a gratin dish with 10g butter. Transfer the fried rice, mushrooms and bacon to a serving dish, placing the fried shrimp, whitefish and scallops, then half of the Gruyere cheese on top of it. Put the white sauce over the whole, and with the remaining Gruyere cheese, scatter it around. Bake in a 180C oven until it browns. When the doria has browned, transfer to a serving dish.