Roasted Sweet Potato Rainbow Salad with Lime Crema

Name: Roasted Sweet Potato Rainbow Salad with Lime Crema
Prep time: 20 min
Cook time: 30 min
Total time: 50 min
Cuisine: American, Southern
Ingredients: 8 oz. sour cream ($1.00); 1 fresh lime ($0.50); 1 small clove garlic, minced ($0.08); 1/4 tsp salt ($0.02); 1.5 lb. sweet potatoes ($1.57); 2 Tbsp cooking oil ($0.08); 1 tsp ground cumin ($0.10); Salt to taste ($0.02); 1 lb. frozen corn kernels, thawed ($1.49); 1 15oz. can black beans ( $0.99); 1 red bell pepper ($1.50); 1/4 red onion* ($0.25); 1/4 bunch fresh cilantro ($0.23)