3 medium sweet potatoes
3/4 pound (about 2 small) boneless skinless chicken breast
1/4 cups olive oil
2 tablespoon fresh lime juice
2 cloves garlic, minced or grated
3 whole chipotle pepper, minced
1 teaspoon dried oregano
1 teaspoon cumin
2 teaspoons chili powder
salt and pepper
2 (half a 10oz bag) cups spinach
5 ounces sharp white cheddar cheese, grated
chopped cilantro, for garnish
greek yogurt, for serving