Heat oven to 350°F.

Spray 13×9-inch (3-quart) glass baking dish with cooking spray.

In 12-inch skillet, cook beef, mushrooms, salt and pepper over medium-high heat 7 to 9 minutes, stirring frequently, until beef is thoroughly cooked; drain.

Place in baking dish.

Arrange cheese over beef mixture, overlapping slices if needed.

In same skillet, melt butter over medium-high heat.

Add onions and bell peppers; cook 3 to 5 minutes, stirring frequently, until peppers are crisp-tender.

Stir in garlic; cook 1 to 2 minutes longer.

Spoon over cheese in baking dish.

Separate dough into 8 biscuits.

On lightly floured surface, pat biscuits into 5-inch rounds.

Arrange biscuits over vegetable mixture.

Bake 35 to 40 minutes or until biscuits are golden brown on top.