Secret Sneaky Sloppy Joes

This is my all time favorite Sloppy Joe recipe. I got it from my sister Jeanne. She has the most amazing, wicked cooking skills of all my sister.... (don't tell the other 5).....
What makes this recipe so sneaky and secretive is.... It is chock full of cabbage. Seriously! And when you mix the sauce into it... it can look a lot like shredded beef.

Secret Sneaky Sloppy Joes

2 pounds ground beef
1/4 head chopped or shredded cabbage (I usually double this)
1 onion diced
2/3 green pepper diced
1/2 bottle of ketchup (how big is that ?? I use a large bottle)
2 stalks celery chopped
6 Tbsp brown sugar
1 tsp. salt
2 Tbsp Worcestershire sauce
1 tsp pepper
2 Tbsp Vinegar
2 Tbsp mustard
2 Cloves garlic
1 Tbsp liquid smoke (optional)

Brown the beef. Add the vegetables and cook for a couple of minutes.
Add the rest of the ingredients and bring to a boil.
Reduce heat and cook for 20 minutes. Stir occasionally to make sure it isn't sticking and burning.
Serve on buns or sliced bread and enjoy.