For this simple salad, heirloom tomatoes (choose red, green, yellow, deep purple, whatever your markets and farm stands have on hand) are marinated in a vinaigrette dressing and arranged on a platter or on individual plates. Mixed greens tossed in more of the dressing are added next. Crumbled blue cheese and bits of bacon are sprinkled over the salad as final flourishes. Offer this salad as a first course for a summer supper or use it as a side dish for a backyard barbecue. Or, pair it with some crusty bread and a chilled soup for a light luncheon entree. This BLT variation is as good as the sandwiches and just as addictive.