Preheat oven to 400 degrees Fahrenheit and line a baking sheet with parchment paper.
Place the chicken breast, broccoli florets, and diced red bell pepper on the sheet pan.
Drizzle with half of the olive oil and season with garlic powder, sea salt, and black pepper.
Roast for 18 to 20 minutes until the chicken is cooked through and vegetables are tender.
While roasting, combine the basmati rice and chicken broth in a small saucepan and bring to a boil.
Reduce heat to low, cover, and simmer for 15 minutes until the liquid is fully absorbed.
Remove rice from heat and stir in the lemon juice, lemon zest, fresh parsley, and remaining olive oil.
Slice the chicken into strips and serve over the warm rice pilaf alongside the roasted vegetables.