Stir sour cream, garlic, dill, onion powder together in a small bowl. Season with salt and pepper; set aside.
Stir honey, garlic, pepper flakes, cayenne, salt, and pepper together in a small bowl. Add chicken to a skillet over medium heat, and heat chicken through. Stir in hot honey mixture; cook and stir just until heated through; remove from heat.
To assemble, warm rice in a microwave-safe bowl on High for 1 to 2 minutes. Divide rice between serving bowls. Top with chicken, then drizzle with sour cream sauce. Top with sliced green onion and serve.