Salad Pelangi Ubi Jalar Panggang dengan Krema Jeruk Nipis

Bahan-bahan (6 porsi)

• 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)
• 2 Tbsp cooking oil ($0.08)
• Salt to taste ($0.02)
• 1 15 oz . can black beans ( $0.99)
• 1 red bell pepper ($1.50)
• 1/4 red onion* ($0.25)
• 1/4 bunch fresh cilantro ($0.23)