01 - Preheat oven to 425°F. Line a large sheet pan with parchment paper or aluminum foil for easy cleanup.
02 - Place the bell peppers, zucchini, cherry tomatoes, and red onion in a single layer on the prepared sheet pan.
03 - In a small bowl, whisk together the melted butter, minced garlic, parsley, lemon juice, smoked paprika, salt, black pepper, and red pepper flakes.
04 - Drizzle half of the garlic butter sauce over the vegetables. Toss gently to ensure they are evenly coated.
05 - Place the sheet pan in the oven and roast the vegetables for 8 minutes.
06 - Remove the pan from the oven. Arrange the shrimp evenly over the partially cooked vegetables and drizzle with the remaining garlic butter sauce.
07 - Return the pan to the oven and roast for 7 to 8 minutes, or until the shrimp are pink, opaque, and curled.
08 - Serve immediately, garnished with extra chopped parsley and fresh lemon wedges.