Pasta Fagioli slow cooker crock pot version

2 lbs ground beef
1 onion, chopped
3 carrots, chopped
4 stalks celery, chopped
2 (28 ounce) cans diced tomatoes, undrained
1 (16 ounce) can red kidney beans, drained
1 (16 ounce) can white kidney beans, drained
3 (10 ounce) cans beef stock
3 teaspoons oregano
2 teaspoons pepper
5 teaspoons parsley
1 teaspoon Tabasco sauce (optional)
1 (20 ounce) jar spaghetti sauce
8 ounces pasta
Directions:

1. Brown beef in a skillet.
2. Drain fat from beef and add to crock pot with everything except pasta.
3. Cook on low 7-8 hours or high 4-5 hours.
4. During last 30 min on high or 1 hour on low, add pasta.