Cheesy Turkey Meatballs with Peppers and Onions

Eat these meatballs on their own, on a sandwich, or over some pasta. There are no breadcrumbs in the meatballs so they're totally gluten free, and I added mushrooms, which add a ton of moisture and flavor. The turkey is a little lighter than traditional beef or pork, but you can't tell. They're so so good. Oh, and cheese. There's so much gooey cheese