Roasted Zucchini Pasta

medium zucchini, trimmed, cut into 1/4-inch-thick rounds

small sweet Vidalia onion or 4 shallots, thinly sliced

garlic cloves, thinly sliced

olive oil, divided

kosher salt

freshly ground black pepper

penne or ziti, dry, preferably whole grain

chopped fresh basil

grated Pecorino Romano cheese

Feta or goat cheese, to taste (optional)

Optional additions: sun-dried tomatoes, sliced plum tomatoes, fresh corn, black olives, mushrooms, toasted pine nuts, pesto, roasted red pepper