1. In a small bowl, beat cream cheese and mayonnaise until smooth. Stir in the ham, cheese, green pepper and mustard. Spread into an ungreased 9-in. pie plate.
2. Toss the cracker crumb and butter; sprinkle over cream cheese mixture. Bake, uncovered, at 400° for 12-15 minutes or until heated through. Serve with crackers. Yield: about 3 cups.