Marinate the chicken: In a bowl, whisk olive oil, vinegar, smoked paprika, garlic powder, onion powder, pepper, and salt. Add chicken and toss to coat.
Marinate at least 20 minutes, up to 8 hours in the fridge.
Cook your grain base: While the chicken marinates, cook rice or quinoa according to package directions. Fluff and set aside. For cauliflower rice, sauté with a little oil and salt for 5–7 minutes.
Make the slaw: Stir Greek yogurt, vinegar, and honey in a small bowl.
Toss with shredded cabbage. Season with salt and pepper. Chill until serving.
Cook the chicken: Grill: Heat grill to medium-high.
Grill chicken 5–7 minutes per side, depending on thickness, until internal temp reaches 165°F (74°C).
Oven: Bake at 425°F (220°C) for 18–22 minutes, or until done.
Skillet: Sear over medium-high 5–6 minutes per side.
Brush with BBQ sauce: During the last 2 minutes of cooking, brush chicken with BBQ sauce on both sides. Let it caramelize lightly.
Rest and slice: Transfer chicken to a cutting board. Rest 5 minutes, then slice or dice into bite-size pieces.
Warm the add-ins: Heat black beans and corn in a small skillet with a pinch of salt and pepper until warmed through.
Assemble bowls: Add a scoop of grains to each bowl.
Top with BBQ chicken, a handful of slaw, beans, corn, and your favorite toppings. Drizzle a little extra BBQ sauce if you like. Finish with lime and herbs.