In saucepan, over medium-low heat, heat salsa and cheese, stirring constantly until cheese melts and is well blended. Serve hot as a dip with vegetables or chips. Cover and store any leftover dip in refrigerator, reheat over low heat to serve.
Microwave: In 1 1/2 quart microwavable bowl, heat salsa and cheese at Medium (50% power) for 7 to 9 minutes until cheese melts and is well blended, stirring every minute. Stir well, serve as above. Reheat leftovers in microwave at high until heated through, stirring every minute.