TOMATOES - ALLA PIEMONTESE

Take four rather unripe tomatoes of about the same size, put them into boiling water and boil for a few minutes. Cut off the stem part, and take out some of the inside with as many seeds as you can. Fill them with boiled rice and some mushrooms chopped up small. Pour over them the yolks of two eggs, place them in the oven to color; serve hot.