Preheat your oven to 400°F.
Season the chicken breast with salt, pepper, and the mixed herbs.
Drizzle olive oil over the chicken to help keep it moist during roasting.
Place the chicken on a baking sheet and roast in the oven for about 20-25 minutes until fully cooked (internal temperature should reach 165°F).
While the chicken is roasting, prepare the quinoa according to package instructions.
Chop the broccoli, cherry tomatoes, and red bell pepper into bite-sized pieces.
Lightly steam the broccoli for about 3-4 minutes to retain some crunch, or leave raw if preferred.
Once the chicken is done, let it rest for a few minutes before slicing it into strips.
Combine the quinoa, vegetables, and sliced chicken in a bowl.
Toss gently to mix and adjust salt and pepper if needed. Serve warm.