Sup Kacang Hitam dan Salsa Panggang

Bahan-bahan (6 porsi)

• 6 Roma tomatoes ($1.43)
• 1 yellow onion ($0.28)
• 1 red bell pepper ($1.50)
• 1 jalapeño ($0.07)
• 4 cloves garlic ($0.32)
• 2 poblano peppers ($1.44)
• 2 Tbsp cooking oil ($0.08)
• 1/2 cup fresh cilantro ($0.20)
• 2 15 oz . cans black beans ($1.60)
• 3 cups vegetable broth, divided ($0.39)
• 1/2 tsp ground cumin ($0.05)
• 3/4 tsp salt ($0.04)
• 1 lime ($0.67)