Cook your base: Make rice or quinoa according to package directions. Fluff and set aside to cool slightly.
Prep the veggies: Steam or roast the broccoli until crisp-tender.
Slice the red bell pepper and green onions.
Mix the sauce: In a bowl, whisk together mayonnaise, Greek yogurt, sweet chili sauce, sriracha, honey, and rice vinegar. Taste and adjust heat or sweetness. Set aside.
Season the chicken: Pat chicken dry.
In a large bowl, combine cornstarch, garlic powder, onion powder, smoked paprika, salt, and pepper. Toss chicken to coat evenly. Shake off excess.
Pan-fry for crisp edges: Heat oil in a large skillet over medium-high heat.
Add chicken in a single layer. Cook 3–4 minutes per side until golden and cooked through. Work in batches so it crisps, not steams.
Sauce it right: Transfer the cooked chicken to a large bowl.
Add about two-thirds of the sauce and toss to coat. Reserve the rest for drizzling when serving.
Assemble the meal prep: Divide rice among 4–5 airtight containers. Top with sauced chicken, broccoli, and bell pepper.
Sprinkle with green onions and sesame seeds. Add lime wedges if using.
Cool before sealing: Let containers cool for 15–20 minutes at room temperature before putting on lids. This prevents condensation and soggy textures.