1 lb (500 g) lean ground beef
1/2 cup (125 mL) chopped onion
1/2 cup (125 mL) chopped green pepper
1 can (8 oz) pizza sauce
1/2 cup (125 mL) sliced fresh mushrooms
1 cup (250 mL) shredded mozzarella cheese
1 cup (250 mL) BISQUICK* mix
1/4 cup (50 mL) very hot water