Preheat the oven to 400° F. Toss diced sweet potatoes and Brussels sprouts with a drizzle of olive oil or spray lightly with oil. Season with salt and pepper. Spread on a baking sheet without overlapping. Then roast for 25 – 30 minutes, flipping halfway through, until golden and tender.
While veggies roast, in a small dish, combine honey, hot sauce, garlic, ginger, and vinegar (if using).
Heat 1 Tbsp olive oil in a large skillet over medium-high heat. Season chicken cubes with salt and pepper. Add to the skillet and cook for 6 – 8 minutes, stirring occasionally, until cooked through and golden on the edges. Pour half of the sauce over the chicken to coat it completely.
Divide cooked quinoa between four bowls. Top each with a portion of chicken, roasted sweet potatoes, and brussels sprouts. Drizzle with remaining spicy-sweet sauce.
Sprinkle each bowl with feta and serve warm! Leftovers can be stored in an airtight container in the fridge for up to three days. For best results, though, keep the sauce separate and add it when reheating.