Preheat and prep: Heat the oven to 425°F (220°C). Line a large sheet pan with parchment for easy cleanup.
Pat the chicken dry with paper towels.
Mix the spice rub: In a small bowl, combine smoked paprika, garlic powder, onion powder, chili powder, salt, and pepper.
Season the chicken: Rub chicken with 1 tablespoon oil and sprinkle the spice mix evenly on both sides. Place on one side of the sheet pan.
Prep the veggies: Cut the sweet potato into 1/2-inch cubes. Slice peppers and red onion into 1-inch pieces.
Toss all veggies with remaining oil and a pinch of salt and pepper. Spread on the other side of the sheet pan in a single layer.
Roast: Bake for 12–14 minutes. Remove the pan, brush the chicken generously with BBQ sauce, flip, and brush the other side.
Toss veggies if needed for even browning.
Finish cooking: Return to the oven for 8–12 minutes, until chicken reaches an internal temperature of 165°F (74°C) and veggies are tender with some caramelized edges.
Rest and slice: Let the chicken rest 5–10 minutes, then slice or cube. This helps the juices settle and keeps the chicken moist.
Cook the grain: While the chicken roasts, prepare rice or quinoa according to package directions. Fluff with a fork and season with a pinch of salt.
A squeeze of lime is great here.
Assemble bowls: Divide rice among 4–5 meal prep containers. Top with a portion of chicken and a mix of the roasted veggies. Drizzle with a little more BBQ sauce if you like.
Add toppings: Finish with cilantro, green onions, or a squeeze of lime.
If adding ranch or a creamy dressing, pack it on the side.