I started with this recipe.
I made a few changes:
-used 2+ lbs. of beef
-used a whole (2 cup) package of shredded 2% (aka low-fat) Mexican blend cheese
-used 2 onions
-used 5 cloves garlic
-used 3 Tbsp. chili powder and 2 1/2 Tbsp. cumin; omitted oregano (forgot it...)
-used one can tomato sauce and 1 drained 15 oz. can of diced tomatoes (I forgot to double the amount of sauce I bought; it's not something I keep around)
-used 2 cans Ranch Style beans
-used 2 cans no salt added corn
-used 5 corn tortillas on each layer, and ripped into quarters instead of cutting into sixths
-used 2 4.8 ounce cans of sliced olives
-used 2 4 ounce cans of green chiles
Here's how I did the layers:
Half of beef mixture topped with about 1/3 of cheese
One can of beans, one can of corn, one can of olives
Rest of beef mixture, topped with 1/3 of cheese
Other can of beans, other can of corn, other can of olives, topped with rest of cheese
It just filled up my 6 qt. crockpot. It will cook for 5-7 hours on low.
I think it will be pretty mild; people will probably want to put some hot sauce on it.
The lady who posted the recipe calls it Mexican but it feels Tex-Mex to me (despite the lack of liquid smoke) so that's how I'm classifying it.