Preheat the oven to 450 F. Place a shallow sheet pan in oven to warm as the oven heats. When ready to cook, line the pan with parchment.

In a large bowl, combine the gnocchi, grapes, broccolini, onion, garlic, oil, thyme, and salt. Season well with pepper and toss well to mix. Transfer the gnocchi-grape mixture to the prepared sheet and spread in an even layer.

Bake for 20 minutes. Stir well, check to see if gnocchi is browning, and then spread back into an even layer. Bake about 5 minutes more or until the vegetables and gnocchi are tender and lightly browned. Finish with crumbled feta and freshly grated lemon peel.