Preheat oven to 350°F (175°C) and spray an 11 x 7 inch glass baking dish with cooking spray.

Separate biscuits and cut each biscuit into 6 pieces.

Set biscuit pieces aside.

In a large nonstick skillet, cook ground beef and chopped onion over medium-high heat for 5-7 minutes, stirring occasionally, until beef is thoroughly cooked.

Drain excess grease from the skillet.

Stir in baked beans with bacon and brown sugar, kidney beans, great northern beans, and barbecue sauce into the cooked beef and onion mixture.

Heat the mixture to boiling, stirring occasionally.

Pour the hot bean and beef mixture into the prepared baking dish.

Immediately top the mixture with the cut biscuit pieces.

Sprinkle the shredded cheddar cheese evenly over the biscuit pieces.

Bake in the preheated oven for 18-20 minutes, or until the biscuits are golden brown and baked through.