Preheat oven to 180°C.
Slice chicken, onion, snow peas and capsicums and coat in taco spices.
Stir fry chicken mix for 3-5 minutes in olive oil.
Place in baking tray and stir in sour cream and cream cheese.
Cover with grated cheese.
Bake for 20-25 minutes until cheese is golden.
Garnish and serve immediately.