Step 1

In a large, heavy-based saucepan, heat the oil over low heat. Add onion and cook for 5 minutes until soft. Add garlic, capsicum and chilli and cook, stirring, for a further minute. Add cumin, pesto, beans, tomatoes and sugar. Cook over low heat for 15 minutes until slightly reduced, stirring occasionally. Season.

Step 2

Serve with tortillas for wrapping, with guacamole, butter lettuce leaves, sour cream, coriander and grated cheese.