Begin by preparing the rice according to the instructions on the packaging, which generally takes around 20 minutes. While the rice cooks, chop and organize all the vegetables and toppings. Set aside.
Slice the chicken breasts or thighs into uniform, bite-sized cubes. This ensures even cooking and optimal texture.
Season the chicken with salt, pepper, garlic powder, and dried basil. Heat olive oil in a large skillet over medium-high heat. Add the chicken and sear until browned on all sides, cooking for about 12 minutes or until the internal temperature reaches 165°F.
As the chicken cooks, prepare the herby ranch. In a small food processor or blender, combine sour cream (or Greek yogurt), apple cider vinegar, garlic, onion powder, chives, cilantro, and salt. Blend until smooth and creamy.
Once the chicken is fully cooked, reduce the skillet to low heat. Add in the buffalo sauce along with the butter. Stir gently until the butter is fully melted and the sauce is warmed through.
To assemble the bowls, spoon rice into the base of each serving bowl. Layer with the buffalo chicken, then add the vegetables: red onion, cucumber, red bell pepper, banana peppers, and green onions. Sprinkle with shredded Monterey Jack cheese if using, and drizzle generously with herby ranch. Garnish with fresh cilantro as desired.