This hearty hash is weeknight-quick thanks to potatoes that are parcooked in the microwave. Smoky bacon, spicy poblano chili and sweet corn bring layers of contrasting texture and flavor. Dried Mexican oregano adds earthy, citrusy notes and is available in most well-stocked supermarkets, but standard Mediterranean oregano works well, too. Top with runny-yolk fried eggs and one or some of the optional garnishes listed below.