Saute the chopped garlic over medium high heat until it's golden brown.
Add the thinly sliced chicken, roasted chili paste, and fish sauce. Mix everything together and cook until the chicken is almost done.
Add the onions and bell peppers and continue to cook until the chicken is done and the vegetables are cooked but still firm. Taste and adjust seasonings to your preferences.
Add the basil and, if you like, the roasted chili flakes. Take off the heat and serve with jasmine rice.