01 - Set a large skillet or wok over medium-high heat. Add 1 tablespoon olive oil or coconut oil and allow it to shimmer until just beginning to smoke.
02 - Add the finely chopped onion, minced garlic, and grated ginger to the hot oil. Sauté for 2 to 3 minutes, stirring frequently, until the onions turn translucent and the mixture is highly fragrant.
03 - Stir in the red curry paste and ground turmeric. Cook for approximately 1 minute, stirring constantly, until the paste darkens slightly and coats the aromatics evenly.
04 - Add the bite-sized chicken pieces to the skillet in a single layer. Sauté for 4 to 5 minutes, turning occasionally, until lightly browned on all sides.
05 - Add the sliced red bell pepper to the skillet. Cook for an additional 2 minutes, allowing the pepper to soften slightly while maintaining some texture.
06 - Pour in the coconut milk, gluten-free soy sauce, fish sauce, and sugar. Stir thoroughly to combine and bring the mixture to a gentle simmer.
07 - Reduce the heat to medium and cook uncovered for 10 minutes, stirring occasionally, until the chicken is fully cooked through and the sauce has thickened to a creamy consistency.
08 - Remove the skillet from direct high heat. Stir in the chopped fresh basil and lime juice, cooking for 1 minute more to wilt the basil and brighten the flavors.
09 - Taste the curry sauce and adjust seasoning with kosher salt and freshly ground black pepper as needed. Serve immediately, garnished with additional basil leaves. Pair with steamed jasmine rice if desired.