This Mexican BYOB in Andersonville is not your run-of-the-mill taqueria. The proof is in the sauce. The kitchen artfully constructs three kinds of signature salsa, ranging from tangy mild tomato to fiery jalapeno-tomatillo. Then there's the mole. Cosina offers a few kinds, but the standout is mole dona esperanza–that's the dark one. The exotic flavor is result of 19 ingredients and at least three days of preparation. It's served atop everything from carne asada to pork to enchiladas. If you're not in the mood for mole, other favorites include parrillada (mixed grill) with sizzling shrimp, chicken, pork, a variety of vegetables and cheese. The mid-sized dining room is casual and cheery, accented with bright colors and Mexican folk art.