Chorizo Sweet Potato Chili

Bahan-bahan (6 porsi)

• 3 links Mexican chorizo ((about ¾ lb.), $2.63)
• 1 yellow onion ($0.70)
• 2 cloves garlic ($0.08)
• 1 lb . sweet potato ($1.88)
• 1 15 oz . can diced tomatoes ($1.06)
• 1 15 oz . can kidney beans ($0.94)
• 1 15 oz . can black beans ($0.94)
• 1 6 oz . can tomato paste ($0.94)
• 1 Tbsp chili powder ($0.30)
• 1/2 tsp ground cumin ($0.05)
• 1/2 tsp dried oregano ($0.05)
• 2 cups water ($0.00)
• 1 bunch green onions ($0.96)