Cook your base: Prepare rice, quinoa, or cauliflower rice according to package directions. Fluff and set aside.
Make the sauce: In a bowl, whisk sriracha, soy sauce, rice vinegar, honey, sesame oil, garlic, and ginger. In a small cup, mix cornstarch with 2 tablespoons water to form a slurry.
Set both aside.
Prep the chicken: Pat chicken dry and cut into bite-size pieces. Season lightly with salt and pepper.
Sear the chicken: Heat a large skillet over medium-high. Add 1 tablespoon oil.
Cook chicken in an even layer for 5–7 minutes, stirring occasionally, until browned and cooked through. Transfer to a plate.
Cook the veggies: In the same pan, add a splash of oil if needed. Toss in bell peppers and broccoli with a pinch of salt.
Stir-fry 4–5 minutes until crisp-tender.
Combine and thicken: Return chicken to the pan. Pour in the sauce and bring to a simmer. Stir in the cornstarch slurry and cook 1–2 minutes until the sauce thickens and coats the chicken and veggies.
Adjust to taste: Add more sriracha for heat, a squeeze of lime for brightness, or a drizzle of honey for balance.
Sprinkle sliced green onions and sesame seeds if using.
Portion: Divide your base among 4–5 meal prep containers. Top with the sriracha chicken and veggies. Let cool uncovered for 10–15 minutes before sealing.