Heat oil in pan, brown mince, add onion, cook 2 minutes, stirring.
Add combined chopped tomatoes and MAGGI Chilli Con Carne Recipe Base. Bring to boil, then simmer uncovered 10 minutes, stirring occasionally.
Place corn chips on serving plates, spoon mince mixture into centre. Sprinkle with grated cheese, grill until cheese melts. Top with light sour cream.
Serve with green salad.