In a small saucepan over low heat, combine all sauce ingredients, stirring until well combined. Start out with one teaspoon of the chili garlic sauce and it you'd like it spicier, add more. Keep warm until ready to combine with noodles, chicken and vegetables.
Cook brown rice noodles according to package directions. Set aside.
Heat a large skillet over medium-high heat. Add one tablespoon of the vegetable oil. When oil is hot, add chicken pieces, Sprinkle with salt and pepper. Fry for 5-7 minutes until cooked through. Remove to plate.
Add the remaining one tablespoon vegetable oil to the skillet. When hot, add the red and yellow peppers and carrots. Stir fry for 4-5 minutes until almost tender.
Return the chicken and the rice noodles to the skillet. Cook until warmed through. Take off the heat and pour the sauce over the mixture, stirring until evenly coated. Sprinkle with green onions and nuts. Serve immediately in individual bowls.