Dijon Chicken w/ Zucchini & Tomatoes

Ingredients (12)

• 1 nonstick cooking spray
• 2 medium zucchini cut into 1/4-inch rounds
• 10 oz grape tomatoes
• 1 tbsp olive oil
• 0.25 tsp black pepper ground, divided
• 0.5 lemon juiced
• 2 tbsp Dijon mustard
• 4 chicken breasts 4-ounce each, boneless, skinless
• 0.5 tsp salt optional
• 0.5 tsp garlic powder
• 1 tsp dried oregano dried
• 1 tbsp Parmesan cheese freshly grated