Slow Cooker Mississippi Pot Roast

Ingredients

• 1.4 kg beef chuck roast (or braising steak)
• 120 ml water
• 120 ml pepperoncini pepper juice (from jar)
• 1 packet roast beef gravy mix
• 60g unsalted butter
• 1/2 tbsp cornflour (optional, for thickening)
• 1 tablespoon dried parsley
• 1 tablespoon dried dill
• 2 teaspoons garlic powder
• 2 teaspoons onion powder
• ½ teaspoon salt
• 1 teaspoon black pepper