Salsa 17 in downtown Arlington Heights, a few miles east of Hoffman Estates. The food is excellent and they have a nice variety of moles and more creative dishes than the usual. See their website menu at
salsa17grill.com for their arrachera dishes, including the traditional-style carne asada. You can get arrachera served with any of their moles. If you're not sure which mole to order, they're happy to bring you samples. They're open all day starting at 11 a.m., seven days a week.