Fry them a little chopped onion and minced meat briefly over high heat. Sprinkle with flour. Add salt, pepper, oregano, then add vegetables, stir and sauté them with a little water. Meanwhile, prepare mashed potatoes, as cool a add beaten egg. In a greased pan with sunflower oil to put vegetable-meat stuffing, mashed potatoes on top, and a portion of mashed potatoes decorated surface with spray. Bake for 30 minutes at 200 C. Optional sprinkled with cheese before baking.