Step 1: Heat the olive oil in a large skillet over medium-high heat. Add the ground turkey and let it sear for 3 minutes before breaking it apart with a spatula.
Step 2: Add the diced onion and red bell pepper to the skillet. Continue to cook for another 4-5 minutes until the onion is translucent and the turkey is fully cooked through.
Step 3: Stir in the minced garlic, oregano, red pepper flakes, salt, and black pepper. Cook for 1 minute until fragrant.
Step 4: Add the zucchini half-moons to the skillet. Sauté for 5-7 minutes, stirring occasionally, until the zucchini is tender but still has a slight crunch.
Step 5: If using cheese, sprinkle it over the top of the ground turkey and zucchini skillet, cover with a lid for 1 minute to melt, then serve immediately.