1-LB. GROUND BEEF, 1 EACH ONION,CHOPPED, 1/2 TSP. SALT, 1/4 TSP. BLACK PEPPER, 1- 103/4 OZ. CAN CREAM OF BROCCOLI SOUP, 1- 10OZ. PKG. FROZEN MIXED VEGETABLES, THAWED, 1 1/2C. EXTRA SHARP CHEDDAR CHEESE , GRATED. IN A MEDIUM SAUCEPAN, SAUTE' GROUND BEEF, SALT ,PEPPER, AND ONION. DRAIN WELL AND SPREAD IN A 2-QUART CASSEROLE DISH. IN A MEDIUM BOWL COMBINE SOUP AND VEGETABLES AND SPREAD OVER MEAT, SPRINKLE TOP WITH CHEESE, BAKE AT 350 FOR 30 MINUTES.