A couple of croquetas from Sergio's are a meal all by themselves. They're not the bite-size variety found at typical Spanish bakeries. But that's not what makes them the best. To begin with, let's acknowledge that a wiener-shaped conglomerate of ground, breaded, fried ham byproduct isn't the most complicated dish within the culinary arts, though simple things often yield the greatest pleasures. So the only trick is to not screw it up, which Sergio's never does. First they grind the cooking ham to its finest consistency; this is so the meat mix inside forms a smooth paste, no chunks. Then ingredients such as grated onions, peppers, and most important, plenty of garlic are added. Finally the croquetas are deep-fried in virgin olive oil. And if you have a midnight craving during the weekend, you don't have to wait till the next day to enjoy them. Sergio's is open 24 hours from Friday to Sunday.