Crockpot Ravioli Casserole

I've been trying to find new and different recipes for the crockpot.  I found this one and thought it looked pretty good.  Zak actually did this whole recipe himself, since I had a busy day and couldn't make it home.  But it turned out really well, and smelled great when I got home.  I think next time we'll use less meat, 1 1/2 lbs. seemed like way too much.  And add a little bit more salt & pepper, but overall it was pretty good!

1 1/2 lbs. lean ground beef (I'm planning on using 1 lb. next time)
1 onion, chopped
1 garlic clove, minced
1 (15 oz.) can tomato sauce
1 can stewed tomatoes
1 tsp. oregano
1 tsp. Italian seasoning
salt & pepper
10 oz. frozen spinach, thawed
16 oz. bowtie pasta, cooked
1/2 c. shredded Parmesan cheese
1 1/2 c. mozzarella cheese

1.  Brown ground beef with onion, garlic and salt & pepper.
2.  Put in crockpot and add sauce, tomatoes & seasonings.  Cook for 6 - 7 hours on low OR 4 - 5 hours on high.
3.  Add spinach, pasta and cheese during the last 30 minutes of cooking and turn temperature to high.  Make 6 - 8 servings, depending on your serving size.

I forgot to get a picture that night, so here it is in our tupperware...but still good!