Stuffed Peppers with Turkey and Vegetables

INGREDIENTS

• 4 green bell peppers, tops removed, seeded
• 1 pound ground turkey
• 2 tablespoons olive oil
• 1/2 onion, chopped
• 1 cup sliced mushrooms
• 1 zucchini, chopped
• 1/2 red bell pepper, chopped
• 1/2 yellow bell pepper, chopped
• 1 cup fresh spinach
• 1 (14.5 ounce) can diced tomatoes, drained
• 1 tablespoon tomato paste
• Italian seasoning to taste
• garlic powder to taste
• salt and pepper to taste