Taco Ubi Jalar Vegetarian dengan Crema Jeruk Nipis

Bahan-bahan (4 porsi)

• 8 oz . sour cream ($0.83)
• 1 fresh lime ($0.69)
• 1/4 tsp salt ($0.02)
• 1 clove garlic ($0.08)
• 1 Tbsp olive oil ($0.13)
• 2 cloves garlic ($0.32)
• 1.25 lbs . sweet potato ($1.22)
• 1 15 oz . can black beans ($0.59)
• 1 tsp ground cumin ($0.10)
• Garam dan merica secukupnya ($0,05)
• 2 g reen onions ($0.19)
• 1/4 bunch fresh cilantro (optional) ($0.17)
• 8 small (taco sized) tortillas ($0.75)