Cod, potatoes, and cornbread combine in this sheet pan supper, along with ample onion and garlic (as essential aromatics), bell pepper, a sprig of parsley, and olive oil for drizzling (be generous when doing so). This is an ideal dinner for busy weeknights, since it can be on the table in less than an hour and requires very little in the way of prep work, or a casual dinner party, with tapas and flan as the before and after offerings.