Gather all ingredients.
Set a heavy cast-iron skillet over medium-high heat; add oil. Toss beef steak tips with salt, granulated garlic, Cantanzaro herbs, and pepper.
Sear beef in batches until browned on all sides. Transfer steak tips to a slow cooker.
Combine beef bone broth, soup, and dry gravy mix; pour over steak tips. Add mushrooms to the slow cooker.
Cover and cook on Low for 8 hours or on High for 5 hours.
