Place the beef into your slow cooker and season with salt and pepper (note: You can use a boneless beef chuck or bone-in; if bone-in, just be sure to remove the bone when you shred the meat at the end).
Make the ranch seasoning: Add the garlic salt, parsley, onion powder and dill to a small bowl and stir to combine.
Sprinkle all over the beef, turning it so that the bottom and sides are also covered.
In a glass measuring cup or small bowl, whisk the beef broth, pepperoncini liquid, corn starch and coconut aminos.
Pour the liquid over the beef, turning once again to ensure that it's evenly coated.
Break the butter substitute up into pieces and place on top of beef.
Place pepperoncini on top of beef.
Cover and cook on low for 8-10 hours, until beef is very tender.
Shred the beef, stir to coat it in the sauce and serve over vegan mashed potatoes, rice or gluten-free orzo.