Bacon-Cheese Fundido: Combine cream cheese, 2 lb. 7 oz. of the cheese shreds, the bacon, mayo, onions and hot sauce in 12-qt. bowl of electric mixer fitted with paddle attachment. Beat on low speed until well blended. Shape into 54 (1-oz.) portions (or 18 portions for trial recipe); cover. Refrigerate until ready to use.
Fresh Tomato Salsa: Combine all ingredients. Cover and refrigerate until ready to use.
For each serving: Place one portion of the cheese mixture in small microwaveable serving dish. Microwave on HIGH 5 to 10 sec. or until slightly softened. Top with 2 tsp. of the remaining cheese shreds. Place under salamander 20 sec. or until cheese shreds are melted. Top with 2 tsp. of the salsa. Serve with the crackers.