Stuffed Pepper Quinoa Skillet - Sprinkles & Sea Salt

Ingredients

• 3 tbsp olive oil
• 3 bell peppers*, cored and sliced
• 1 large onion, chopped
• 2 large garlic cloves, crushed
• 1 pound ground beef
• 1/2 tsp salt
• 1 tsp oregano
• 2 cups cooked tricolored quinoa
• 1 28oz can crushed tomatoes in tomato purée
• 2 cups shredded mozzarella cheese, divided