Preheat and prep pans: Heat oven to 425°F (220°C).
Line two large sheet pans with parchment for easy cleanup.
Season the sweet potatoes: Toss cubed sweet potatoes with 1 tablespoon olive oil, 1 teaspoon smoked paprika, 1/2 teaspoon garlic powder, 1/2 teaspoon salt, and a few grinds of pepper. Spread on one sheet pan.
Prep the veggies: Cut broccoli into florets, slice bell pepper into strips, and slice red onion. Toss with 1 tablespoon olive oil, a pinch of salt, and a dash of chili powder.
Spread on the second pan.
Roast: Place both pans in the oven. Roast for 20–25 minutes, flipping once, until sweet potatoes are caramelized and veggies are tender with a bit of char.
Season the chicken: While veggies roast, pat chicken dry. Sprinkle both sides with 1 teaspoon smoked paprika, 1 teaspoon garlic powder, 1/2 teaspoon onion powder, 1/2 teaspoon chili powder, 1/2 teaspoon salt, and pepper.
Cook the chicken: Heat a large skillet over medium-high with 1 tablespoon olive oil.
Sear chicken 3–4 minutes per side until golden. Reduce heat to medium-low, add 1 cup BBQ sauce, and simmer 5–8 minutes, turning occasionally, until chicken is cooked through and glazed. Internal temp should reach 165°F (74°C).
Rest and slice: Transfer chicken to a board and let rest 5 minutes.
Slice or cube into bite-size pieces. Toss with a spoonful of extra BBQ sauce for shine.
Make quick slaw: In a bowl, whisk 1/3 cup Greek yogurt (or mayo), 1 tablespoon apple cider vinegar, a pinch of salt, and pepper. Add coleslaw mix and toss.
Adjust vinegar and salt to taste. You want it bright and lightly creamy.
Cook grains (optional): If adding brown rice or quinoa, cook according to package directions. Fluff and cool slightly.
Assemble bowls: Divide grains (if using) among 4–5 meal prep containers.
Add a scoop of sweet potatoes, roasted veggies, sliced BBQ chicken, and a handful of slaw. Drizzle with a little BBQ sauce if you like.
Finish with freshness: Top with chopped green onions or cilantro. Add lime wedges on the side for a pop of acid.
Cool and store: Let bowls cool uncovered for 10–15 minutes before sealing and refrigerating.