Preheat and prep: Heat your oven to 425°F (220°C).
Line a sheet pan with parchment or foil for easy cleanup. Pat the chicken dry with paper towels for better browning.
Mix the rub: In a small bowl, stir together the smoked paprika, garlic powder, onion powder, cumin, chili powder, salt, and pepper.
Season the chicken: Drizzle chicken with oil, then coat evenly with the spice mix. Use your hands to rub it in so the seasoning sticks.
Roast the chicken: Arrange chicken on the sheet pan and roast for 15–18 minutes for breasts (thighs may need 18–22 minutes), until the internal temperature reaches 165°F (74°C).
Brush with BBQ sauce: Pull the pan out, brush chicken generously with BBQ sauce, and return to the oven for 3–5 minutes to set the glaze.
Rest and slice: Transfer chicken to a cutting board and rest 5 minutes.
Slice or dice into bite-size pieces.
Cook the grain: While the chicken roasts, cook your rice or quinoa according to package directions. Fluff with a fork and season lightly with salt if needed.
Prep the veggies: Steam the broccoli until crisp-tender. Toss bell pepper, red onion, and corn with a little oil, salt, and pepper.
You can roast them on a second sheet pan at the same time as the chicken for extra flavor or keep them fresh and crunchy.
Assemble the bowls: Divide the grain among 4–5 containers. Add the chicken, veggies, and black beans if using. Drizzle a little extra BBQ sauce on top or pack it separately.
Cool before sealing: Let everything cool uncovered for about 15–20 minutes.
Then seal and store in the fridge.