In a large skillet or frying pan, sauté the bell peppers and onion in olive oil.
Add the garlic salt, curry powder, chili powder and cayenne pepper and allow to cook, stirring frequently, until peppers and onion are soft, about 5 – 7 minutes.
Divide the peppers between the four flour tortillas.
Add a bit of salsa, avocado, and sour cream to each and serve immediately.