'Nother one, from a friend.  We just tried it last nite for supper, and really liked it.

Brown 1# hamburger together with a medium chopped onion and a chopped green pepper.

Drain

Add 1 12oz jar salsa, 3/4c fat free or light Miracle Whip, and 1T chili powder.  Mix (can add jalapeno peppers to this if you like)

Spray a 2qt casserole with Pam, and layer 1c crushed baked tortilla chips in the bottom

Spread 1/2 of the prepared meat mixture on top

Sprinkle 1c low fat shredded cheddar cheese evenly over the meat mixture

Spread 1 can drained chili beans, black beans, kidney beans (whatever you like) over the cheese

Repeat crushed chips, meat, and cheese layers

Bake at 350 for 20-25 minutes

Top with shreadded lettuce and chopped tomatoes, serve with fat free sour cream and taco sauce.