Peel onion and garlic and chop finely. Boil rice al dente. Divide cauliflower into florets and boil in salted water until al dente. Preheat the oven to 180 ° C.
In a pan heat oil and fry onion, garlic and minced. Season with salt, pepper, marjoram and paprika powder. Mix well minced, rice and sour cream. Grease a baking dish and alternately layering in cauliflower and rice minced mixture. Sprinkle with cheese and bake for about 20 minutes.