Cook the grains: Rinse 1 cup brown rice or quinoa.
Cook according to package directions. Fluff and set aside to cool slightly.
Heat the oven: Preheat to 425°F (220°C). Line a large sheet pan with parchment for easy clean-up.
Prep the veggies: Toss broccoli and cauliflower florets with 1 tbsp oil, a pinch of salt, and black pepper.
Spread on the sheet pan. Roast for 15 minutes, stir, then roast 8–10 minutes more until tender with crispy edges. Set aside.
Sauté bell pepper in a skillet with a splash of oil for 3–4 minutes to soften, or leave it raw for crunch.
Season the chicken: Pat chicken dry. In a bowl, combine garlic powder, onion powder, smoked paprika, salt, and pepper. Toss with the chicken to coat evenly.
Sear the chicken: Heat 1 tbsp oil in a large skillet over medium-high.
Add chicken in a single layer (work in batches if needed). Sear 3–4 minutes per side until cooked through (165°F/74°C internal). Remove from heat.
Make the buffalo sauce: In a small saucepan, warm hot sauce, melted butter, and honey over low heat.
Stir until smooth. Taste and adjust heat or sweetness.
Toss to coat: Pour buffalo sauce over the cooked chicken and toss until fully coated and glossy.
Mix the yogurt ranch: Stir Greek yogurt with ranch seasoning (or dill, garlic, onion), lemon juice, and a pinch of salt. Thin with a teaspoon of water if needed for drizzling.
Assemble the meal prep: Divide grains among 4–5 containers.
Add buffalo chicken, roasted broccoli/cauliflower, and bell pepper. Sprinkle sliced celery on top for crunch.
Add toppings: Drizzle a spoonful of yogurt ranch over each portion or pack it separately. Garnish with green onions.
Add a little crumbled blue cheese if you like.
Cool, then seal: Let containers cool for 15–20 minutes before sealing to reduce condensation.