If you've never had authentic New York–style pizza, then what you think is pizza might in fact be tomato cheesecake. Clear up any lingering confusion with today's real deal: for $10, you get $20 worth of authentic NY-style pies and slices from Rotten City Pizza in Emeryville. Each Groupon is good for dine-in or takeout only.

Rotten City gives a green-thumbed go-ahead to chow down on any of its organically infused creations. Tip your cap to the funghi pie with roasted cremini mushrooms tossed about toasted garlic chips under a blanketing trio of mozzarella, provolone, and parmigiano cheeses ($23 per pie, $3.50 per slice), or fall mouth first into a marinara pie featuring garden-rich basil, fresh thyme, and toasted garlic splashed with extra-virgin olive oil and salted by the sea ($19 per pie, $3 per slice). The bianco verde is a fan favorite, with its potent combination of fresh mozzarella, ricotta, parmigiano, arugula pesto, chili flakes, and olive oil. Carnivores can hang a fang on hand-crafted salami, crater-laden sausage, and salt-cured anchovies for an extra $3 per ingredient.

Each authentic creation is available as a full-unit circle or as a fractional, yet functional, triangle portion. By the slice, three corners hang happily off a regulation paper plate, allowing five clean fingers to put their pie on a pedestal for every bite. Pick up a few pies and then mix and match their contents, stitching different slices into a pan-sized pizza quilt (pizza quilts will not protect you from frostbite, roommates, or bears).

Reviews

Over 100 Yelpers give Rotten City Pizza four stars, and 100% of Urbanspooners like it:

• Bay Area pizza sucks. It really does. It's unbelievable how hard it is to get a decent slice. But this place is the real thing. Crispy, greasy, good cheese, good sauce. Serious toppings. – Jaiun N., Yelp
• i only eat pizza from rotten city, will travel many miles to feast on the bianco verde. – Eric L., Yelp
• This place keeps getting better and better and the workers always put a smile on my face -- so friendly and approachable and the pizzas never disappoint. – Nizaria D., Yelp