For variety, pickled carrots can be substituted for Jalapenos. For different effects, aditional carrots and/or jalapenos can be finely diced and added to the dip. Dip increases in jalapeno strength with age.
Use blender to liquify jalapenos, then onion and cheese, cut in 1" cubes. When well blended, mix in bowl with mayonnaise. Dip will stay for 2 weeks in refrigerator.