Crock-pot "Lasagna"

I had found this recipe online; unfortunately, I'm not certain about where it came from, or else I'd give credit where credit is due. I've tinkered with it somewhat to accommodate personal taste, and I really like the way it turns out as listed below.

Crock-pot Lasagna

1 pkg. wide egg noodles, cooked and drained
2 lbs. ground turkey
1 small onion, diced small
3 cloves of garlic, pressed
1 jar (24 oz.) marinara sauce (I use Barilla)
10 – 15 slices Hormel turkey pepperoni, minced
2 c. mozzarella, shredded
1/3 c. Parmesan or Romano, grated

1. Brown meat and onions in a large fry pan; drain out any excess grease and add garlic.
2. Mix in sauce and pepperoni.
3. Butter bottom and sides of 6-qt. crock-pot.
4. Spoon 1/3 of the meat in a layer on the bottom, then cover with cheese, and then a layer of noodles.
5. Repeat the layers two more times—you'll end up with a layer of noodles on top.
6. Sprinkle additional Parmesan/Romano and put lid on.
7. Cook on low for 2 or 3 hours, or until sides are bubbly and cheeses are melted.
   

NOTES: It can be difficult to estimate how thick the layers will turn out, but there's really no way to screw it up, honestly. You may think you're running out of room, but as it simmers, the layers will compress and it'll be fine.
FYI—my crock-pot is a Hamilton Beach SC30 model, and I like it a lot. Casey, bless his heart, bought it for me spur-of-the-moment on a day when we were having a party and I was being irritable. Love that man! LOL!