Set your oven to 400°F (200°C) and prepare a baking tray with parchment paper.
In a bowl, mix the diced chicken pieces with olive oil, salt, and black pepper. Spread the seasoned chicken on the baking tray.
Bake the chicken for about 15 minutes until cooked through and golden, checking halfway through for even cooking.
While the chicken is baking, melt the butter in a medium saucepan over medium heat. Once melted, stir in hot sauce and allow to simmer for about 3 minutes, stirring occasionally.
After the chicken is done, toss it in the prepared buffalo sauce until well coated.
To serve, layer cooked quinoa or rice in bowls, top with buffalo chicken, mixed greens, and your choice of carrots or celery. Drizzle ranch dressing and sprinkle with shredded cheese.