In a large pot, heat oil over medium heat
Stir in peppers, onions, garlic, and cumin.
Cook 5 minutes, or until vegetable are tender.
Mix in tomatoes and peppers
Pour in broth and season with salt and pepper.
Bring to a boil, reduce heat to low; simmer for 30 minutes
Add in lime juice
Blend with an immersion blender (optional)