Cleaning, washing and finely chopped onion stew in the vegetable oil until soft. Add finely chopped tomatoes and sauté ten minutes. Add the cleaned and washed rice, pour a little hot water and stew until the swelling. From the flour, the butter, milk and eggs are prepared beshamelov sauce. Mix the rice and peas, add salt and mix with 2/3 of the sauce beshameloviya. Pour the mixture into a greased pan with butter and bake in the oven. Almost ready, moussaka pour the rest of beshameloviya sauce, sprinkle with grated cheese and bake for 5-10 minutes. Serve with yogurt.