In a skillet on high heat, sear the pork on each side. Place in your slow cooker (I use a 6 quart). Spread the minced garlic cloves, purple potatoes, green beans, & onion around the pork. Squeeze the juice of one lemon evenly over top of the vegetables & pork. Sprinkle with garlic salt & pepper to taste. Slice the other lemon & arrange over top of the vegetables & pork. Pour in enough chicken broth to cover the vegetables by 1/2".