Preheat your oven to 400°F (200°C).
On a large sheet pan, drizzle 2 tablespoons of olive oil.
Add the sliced bell pepper, onion, zucchinis, and cherry tomatoes to the sheet pan. Toss the vegetables in the oil until they are well coated.
Place the sausages on the sheet pan among the vegetables.
Sprinkle garlic powder, dried Italian herbs, salt, and pepper over the sausages and vegetables.
Use a spatula to toss the vegetables gently, ensuring that everything is evenly seasoned.
Arrange the sausages and vegetables in a single layer on the sheet pan.
Bake in the preheated oven for 25-30 minutes, or until the sausages are browned and cooked through and the vegetables are tender.
Remove the sheet pan from the oven and let it rest for a few minutes.
If desired, garnish with fresh parsley before serving. Enjoy your meal!