What happens when business partners of different ethnic backgrounds decide to open a restaurant together? You get Diablo McGee's, a Mexican restaurant with a funny name. Diablo McGee's, located on South Lindbergh Boulevard near the Home Depot, bills itself as having the best Mexican food in South County. But in addition to fajitas, tacos, enchiladas and the like, you can choose from hamburgers, sandwiches, pizza and typical bar-fare appetizers. Not to mention at least six types of margaritas, plus specialty cocktails and domestic and imported beer.