Chef Rick Mahan, who built his stellar reputation at The Waterboy in midtown, has branched out with a more casual concept at his East Sac eatery. The most arresting feature of the open, airy bistro is a tiled pizza oven that cranks out chewy, flavorful pizzas. Don’t miss the Rick’s V pizza, made with new potatoes, sopressata, mortadella and leeks, or the housemade Italian sausage pizza, with mozzarella cheese, peperonata and broccoli rabe. But OneSpeed offers more than just pizza: Dig into the lovely frito misto, one of the delectable salads or a housemade pasta.