Preheat the oven to 400°F. In a pan, toss the sweet potatoes with the olive oil, 1/4 teaspoon salt, and 1/2 teaspoon cumin, and roast for 25 to 30 minutes, until soft and slightly browned

While that's roasting, add the tomatoes, black beans, corn, cayenne, and rest of the cumin to a large pot, and cook on medium heat for 15 minutes, stirring often

Place a wrap on a plate, and microwave for 15 seconds so it becomes more soft and warm. Spoon out 1/4 of the bean mixture into the center of the tortilla. Add 1/4 of the roasted sweet potatoes. Fold in the sides of the wrap, then the bottom, then the top. Turn it over, place on a plate with some salsa, and enjoy! Or if you prefer a crunchier tortilla, pop the burrito in the oven for 15 minutes