Heat oil in a large skillet or wok over medium high heat. Add the onions and cook, stirring occasionally, for 5 minutes. Add the garlic, ginger, and curry paste, cook, stirring for 1-2 minutes.
Add the broccoli, peppers, chicken, coconut milk, and water, reduce heat to medium and cook until the chicken is cooked through, and the vegetables are almost tender, about 5 minutes. Stir in the spinach, Marukan Organic Rice Vinegar, and soy sauce, and cook, stirring until the spinach is wilted.
Serve over rice and garnish with basil and chili slices.