Add the ground turkey and garlic. Use a wooden spoon to break up the turkey as it cooks. Stir occasionally, and cook for about 5 minutes.
Add the onions and yellow peppers, and cook until the onions are soft.
Add the sweet potato, red chili flakes, salt, and pepper.
Cover the skillet, and cook until the sweet potatoes are tender. Don’t forget to stir occasionally. If necessary, add more olive oil or a little bit of water to cook the sweet potatoes faster.
While the sweet potatoes are cooking, preheat the oven to 400ºF.
When the sweet potatoes are tender, add the shredded mozzarella cheese, and put the skillet in the oven to melt the cheese.
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