Boil and de-bone chicken, reserving 1 1/2 cups of broth.
Grease a 9 x 13-inch pan and cover bottom with crushed nacho cheese chips.
Layer chicken, 1/2 of the onion, and 1/2 of the cheese. Repeat with remaining chicken, onion, and cheese.
Boil soup with the reserved 1 1/2 cups chicken broth, jalapeno peppers, and picante sauce. Pour over chicken, onions, and cheese. Top with additional nacho cheese chips.
Bake at 350o for 30 minutes.