Begin by preheating your oven to 425°F (220°C). This ensures that your dish will roast evenly and develop a lovely golden color.
On a large sheet pan, evenly spread the gnocchi, halved cherry tomatoes, sliced zucchini, diced bell pepper, and chopped red onion.
Drizzle the olive oil generously over the vegetables and gnocchi. Add the basil pesto directly on top, then generously season with salt and pepper according to your taste.
Using your hands or a large spatula, gently toss all the ingredients together, ensuring each piece of gnocchi and vegetable is well coated with the oil and pesto mixture.
Arrange the gnocchi and veggies into a single, even layer on the sheet pan. This step is crucial for achieving uniform cooking and browning.
Place the sheet pan in the preheated oven and roast for 20-25 minutes. Be sure to stir the mixture halfway through cooking to promote even browning, until the gnocchi are golden and the vegetables are tender.
About five minutes before the end of the cooking time, add the fresh spinach to the sheet pan. Gently stir it in, allowing it to wilt slightly without overcooking.
Once the roasting time is complete, carefully remove the sheet pan from the oven and let it cool for a few minutes. Before serving, garnish the dish with fresh basil leaves and, if you like, a sprinkle of grated Parmesan cheese for that extra flavor kick.
Notes
Feel free to customize the vegetables based on your preferences.