I make it all the time, very yummy
1 lb ground beef or turkey
1 jar marinara sauce
1 1/4 cup water
15 oz ricotta cheese
1 egg white
1 cup mozzarella cheese
6 lasagne noodles ( i use the regular kind)
brown the ground beef, add the jar of marinara sauce, and the water.
I usually add some spices at this point too, basil, garlic powder, ( i don't measure)
in another bowl mix the ricotta, egg white and mozzarella cheese together.
then put some of the sauce mixture on the bottom of the crock, then noodles, then cheese, and keep layering it ending with sauce at the top.
cook it on low for about 3 hours.
that recipe makes about 8 servings, you could double it if your crock is big enough