Mediterranean Roasted Vegetable Galette

small eggplant (just under 1 pound), cubed

Salt

medium Roma tomatoes, cut into 1-inch pieces

small zucchini (total 12 ounces), cut into 1/2-inch cubes

medium red bell pepper, seeded and cut into 1-inch pieces

olive oil, plus more for brushing pastry

garlic, minced

large sprig fresh basil, thinly sliced

Freshly ground black pepper

Cornmeal

roll (1/2 package) refrigerated pie crust

freshly grated Parmesan cheese, divided