Pizza Casseroel

Shared by some friend who make it often. Haven't tried it yet, but made a note of some changes/shortcuts I may take...

1lb ground beef
1 cup onion chopped
1 (2oz) can sliced black olives,drained
1 (15oz) can pizza sauce
1/4 lb pepperoni coarsely chopped
1/2 tsp dried Italian seasoning
1 (4oz) can sliced mushrooms, drained
6 oz mozzarella cheese,thinly sliced

Biscuit Topping.
 1 cup milk
1 tbs oil
2 eggs
1 cup flour
1/4 tsp salt
1/4 cup Parmesan

DIRECTIONS:
preheat oven to 400 degrees and prepare baking dish
(1.75 qt oval baking dish works nicely)
Over medium heat, combine the ground beef, onion, and garlic in a large skillet until beef is browned
add mushrooms, olives, pepperoni and tomato sauce and heat through
pour mixture into prepared baking dish.
sprinkle with mozzarella cheese
Top randomly with biscuit pieces
bake 15-18 minutes until biscuit are browned and casserole is bubbly..

NOTES:  May try whipping up some Bisquick and dropping lumps of it on top with the Parmesan cheese mixed in . I'm not sure if "prepared" dish means non stick spray?- I will probably do that.. also would most likely drain the grease from the beef before adding in the mushrooms..etc.