Preheat oven to 375°F. Grease a 9x13 casserole dish, set aside.
In a large skillet over medium-high heat, sauté onion and bell pepper in olive oil untilwilted. Add garlic and cook, stirring, for 30 seconds. Remove from heat.
In a large bowl, combine onion mixture, marinara sauce, Italian seasoning, salt andpepper.
Cut each biscuit into 6 equal pieces and gently toss cut biscuits in the marinara mixture. Add meatballs and fold just a couple of times to disperse meatballs (they don’thave to be fully coated in sauce)
Transfer mixture into greased casserole dish. Cover casserole dish with foil and bakefor 25 minutes.
Remove foil, add cheeses, and bake another 15 to 20 minutes, until bubbly and cheeseis melted. If desired, broil a minute or two top crisp the top just slightly.
Sprinkle top with fresh herbs if desired and serve hot!
