If using wooden skewers, soak them in water for at least 20 minutes to prevent them from burning on the grill.
Cut the chicken breast, bell peppers, and red onion into uniform 1-inch pieces to ensure even cooking and a beautiful presentation.
In a medium-sized mixing bowl, whisk together the olive oil, gochujang, tamari, honey, garlic powder, smoked paprika, sea salt, and black pepper until smooth.
Add the diced chicken and vegetables to the bowl, tossing thoroughly to ensure every piece is well-coated in the spicy marinade.
Thread the chicken, peppers, and onions onto the skewers, alternating the ingredients for a balanced flavor in every bite.
Heat a grill pan or outdoor grill over medium-high heat and lightly grease the surface with a small amount of oil.
Grill the skewers for approximately 4-5 minutes per side, or until the chicken is cooked through and the vegetables show a light, smoky char.
Place the warm cooked quinoa on a small serving plate and arrange the skewers on top, finishing with a garnish of fresh cilantro.