Place the sliced onions in the bottom of the crock pot.
Make a few small cuts in the top of the roast about an inch to inch and half deep. Then push the garlic cloves into the openings you made.
Place the pork roast on top of the onions.
Sprinkle the roast with all of the seasonings and the Worcestershire sauce. You can add in potatoes or other vegetables you would like to cook alongside the roast.
Cook on low 8-10 hours or on high 4-5 hours.
Remove from crock pot and let rest about 10 minutes. Then slice and serve.