Prepare your ingredients by dicing the zucchinis, chopping the onion and bell pepper, and mincing the garlic.
In a large skillet over medium heat, warm the olive oil. Add the chopped onion and diced bell pepper, sauté for 3-4 minutes, then add minced garlic for an additional 1-2 minutes.
Add the ground turkey to the skillet, breaking it apart as you cook for 5-7 minutes until no longer pink.
Season with salt, pepper, Italian seasoning, and paprika, stirring thoroughly.
Incorporate diced zucchinis and pour in the can of diced tomatoes, stirring and bringing to a gentle simmer.
Cover and cook for an additional 5-7 minutes until zucchini is tender. If using mozzarella, sprinkle on top and cover until melted.