A hamburger patty is a ground meat patty that is usually grilled, fried, or baked.
Mix all ingredients.
Shape into 4 patties, about 3 1/2 inches in diameter.
Place in square baking dish 8 x 8 x 2-inches.
If desired, brush each pattywith additonal catsup.
Cover loosely and microwave on high (100%) 5minutes; turn dish one-quarter turn.
Microwave until done, 2 to 3 minutes.