Nacho Ubi Jalar Panggang Sehat

Bahan-bahan (4 porsi)

• 2 large sweet potatoes
• 1 tablespoon olive oil
• 1 teaspoon each chili powder and cumin
• 1 14 -ounce can refried black beans (I like Amy’s Organic brand)
• 1 cup frozen sweet corn
• 3 oz . multigrain tortilla chips (enough for a single layer)
• chopped cilantro for topping
• crumbled Cotija cheese for topping
• 1/2 teaspoon butter
• 1 large clove garlic, minced
• 1 1/2 cups milk
• 2 tablespoons flour
• 1/4 teaspoon salt – more to taste
• 1/2 cup shredded cheese of choice (I used Monterrey Jack)