4 sweet potatoes, cut into ¼-inch rounds
2 tablespoons neutral oil
1 teaspoon ground cumin
½ teaspoon salt
1 cup Monterey Jack cheese
1 cup shredded mozzarella
1 ½ cups black beans, warmed and strained
1 avocado, cubed
¼ cup red onion, diced
1 jalapeño, thinly sliced
2 tablespoons cilantro, chopped
½ cup sour cream
1 teaspoon lime juice
½ teaspoon salt