Spray an 8 quart slow cooker with a non stick spray. Add onions, potatoes, carrots and celery to the bottom of slow cooker. Place roast on top of veggies. Sprinkle with salt, pepper, garlic salt, thyme and onion soup mix over meat. Pour diced tomatoes on top of meat and add broth. Cover and cook on low 10-12 hours or on high for 7-8 hours.
While these cuts of beef are too chewy to broil, grill or oven-roast, they are flavorful and become tender when slow-cooked in moist heat. This makes the slow cooker ideal for cooking a beef shoulder. Vegetables and beef in a crock pot.
Pour beef broth in the sides of the slow cooker. Add 6-8 pepperoncini peppers and 1/2 cup of liquid from the peppers. Place 1 stick of butter on top of the beef, cover and cook on low 8-10 hours or high 4-5 hours or until beef is fork tender.
Heat olive oil in Dutch oven then brown roast on all sides. Place roast into crock pot and cover with bacon strips. Add water, vinegar, tomato paste, and salt into Dutch oven . Whisk to loosen up the browned pieces on bottom of pan. Add celery, onion, garlic, and bay leaves into the crock pot.