In a large bowl whisk together 1 tablespoon soy sauce and 1 teaspoon cornstarch. Add chicken and toss to coat well. Marinate for 10 minutes at room temperature. In large measuring cup measure out 3/4 cup of sweet chilli sauce add fish sauce, lime juice, and soy sauce combine and set aside for end of recipe.

In large frying pan heat oil on medium~high, when oil is hot, add chicken slices in one layer and cook for 2 minutes on each side. Remove chicken to a plate, and add chicken remaining until all chicken has been cooked.

Lower heat and add garlic, and lime zest to pan, saute for 30 seconds, add peppers and onions continue to cook moving around until peppers start to become tender. Add chicken back to pan along with basil, toss to combine. Pour sweet chilli sauce combo over chicken and peppers, toss to coat. Cook for an additional 1-2 minutes. Sauce should thicken slightly. Serve over rice.