Beef and Sweet Potato Quesadilla

Microwave sweet potatoes on high for 15 minutes, until tender. Cook beef in olive oil and garlic until cooked through. Meanwhile, in a bowl, combine onions and sugar, mix well. Add sweet potatoes to the mixture, mash potatoes with the fork, add salt and pepper to taste. Divide potato filling among 4 tortillas. Add beef and mix well. Heat one teaspoon of olive oil and marinara sauce in a large skillet over medium heat, and add 1 quesadilla to skillet, top with cheese, and cook until crispy. Repeat with remaining tortillas and serve.