How to make the most delicious Crock Pot Philly cheesesteak sandwich. Easy slow cooker recipe with tips for the best meat, vegetables, bread, and cheese. Ingredients 2 pounds sirloin steak*, thinly sliced NOTE: I used Tri Tip but any good sirloin will do. 3 cloves garlic, minced 1 medium yellow onion, sliced 4 ounces fresh mushrooms**, minced <~~~ NO 2 … [Read more...] about Crockpot Philly Cheese Steak