Prepare the Chicken Marinade:
In a bowl, combine olive oil, garlic powder, paprika, onion powder, oregano, black pepper, salt, and lemon juice.
Coat the chicken breasts evenly with the marinade. Cover and refrigerate for at least 30 minutes.
Grill the Chicken:
Preheat your grill or grill pan over medium-high heat.
Place the marinated chicken on the grill and cook for 6-8 minutes per side, or until the internal temperature reaches 165°F (75°C).
Remove from the grill and let rest for 5 minutes before slicing.
Steam the Veggies:
In a steamer basket or microwave-safe container, steam the broccoli, carrots, zucchini, and bell peppers for about 5-7 minutes, or until tender but still slightly crisp. Season with salt and pepper.
Assemble for Meal Prep:
Divide the grilled chicken and steamed veggies evenly among your meal prep containers. Store in the refrigerator for up to 4 days.