I should admit that I went to Moab Brewery pretty much because it was right across the street from my hotel. It ended up being a really nice discovery. It has a warm, friendly mountain lodge vibe and they serve massive portions for reasonable prices (in the $10-15.00 dollar range. It even has some vegetarian dishes! As the name suggests, Moab Brewery also brews its own beer, which is very, very good. I'd suggest getting the vegetarian chili...super filling and only $5.00!
If you're looking for a good place to have breakfast, lunch or a coffee, this is the place in Moab. It is well-known for its muffins, but also offers a variety of sandwiches and salads at a reasonable price, and everything is delicious.