Preheat oven to 425*F. In medium bowl, mix beef, taco seasoning mix and ice water with hands. Press into bottom and up sides of a mini-muffin pan.
Prepare Tortilla chip filling by mixing all ingredients in small bowl. Place a spoonful of filling into each shell, mounding slightly. Sprinkle cheddar cheese over tops. Bake 7-10 minutes. Remove tarts from pan with tip of knife.Serve immediately or cool and freeze.