Prepare your ingredients: Mince the garlic, slice the chilies, and chop any vegetables. Having everything ready is crucial for stir-frying.
Heat your wok or skillet: Use high heat and add oil until shimmering.
Cook the aromatics: Quickly stir-fry the garlic and chilies until fragrant, about 30 seconds.
Add the chicken: Stir-fry until browned and cooked through, breaking it up as needed.
Pour in the sauce: Combine the fish sauce, soy sauce, oyster sauce, and sugar in a bowl and add to the pan.
Stir-fry and reduce: Cook for a few minutes until the sauce thickens slightly and coats the chicken.
Add the basil: Toss in the Thai basil and stir just until wilted.
Serve immediately: Traditionally over jasmine rice with a crispy fried egg on top.