Ground Turkey, Kale and Sweet Potato Skillet

Name: Ground Turkey, Kale and Sweet Potato Skillet
Prep time: 10 min
Cook time: 30 min
Total time: 40 min
Cuisine: American
Ingredients: 2 tablespoons oil (olive, coconut, avocado..); 2 cloves garlic, minced; 1/2 of a yellow onion, finely chopped; 1 lb ground turkey; 2 small sweet potatoes, peeled and diced; 2 tablespoons fresh rosemary, chopped; 1/2 teaspoon crushed red pepper; 1 teaspoon salt; 1 teaspoon pepper; 4 cups kale, stems removed and broken into smaller pieces; 1/2 cup shredded mozzarella cheese, optional