Parmesan-Crusted Cod with Garlicky Summer Squash

small zucchini, sliced into 3/4-inch-thick rounds

small yellow summer squash, sliced into 3/4-inch-thick rounds

garlic cloves, minced

olive oil

Salt and pepper

5 - 6 ounces cod fillets, skinned

panko bread crumbs

grated Parmesan

chopped parsley