PREPARATION:

1. Place unwrapped cream cheese on paper plate. Microwave on HIGH 15 seconds or until softened.
2. Combine cream cheese, olives and mustard in small bowl; mix well.
3. Spread about 2 tablespoons cream cheese mixture over each tortilla. Top each with 2 overlapping slices of beef.
4. Place onion on one edge of tortilla, trimming onion to fit diameter of tortilla. Roll up tortilla jelly-roll fashion. Cut each roll into slices to serve.