Spray, butter, or oil the crockpot insert.
Wash and cut the tops off the peppers. Pull out and discard all the seeds membranes.
In a separate bowl mix the raw meat, rice, half the tomato sauce, onions & seasonings.
Stuff the peppers with the mixture and place them in the bottom of the crockpot.
Mix the remaining tomato sauce and Worcestershire sauce. Pour over and around the peppers.
Place the pepper tops back on top the stuffed pepper (optional but cute).
Pour 1/2 cup water around the peppers but not over the top.
Cover and cook on low for 6 to 8 hours