Heat a little oil in a saucepan and fry onion until soft (1-2 minutes). Add pepper and fry for a further 1 minute.
Stir in tomatoes, chipotle sauce, Knorr stock and sweetcorn. Simmer for 12-15 minutes.
Serve in bowls topped with the tortilla chips, and top with cheese and avocado.
All information is provided by Knorr