Pepperoni Pretzel Bread Stromboli

Ingredients

• 4 Tablespoons butter
• 2 teaspoons kosher salt
• 22 ounces all-purpose flour
• 1 Tablespoon sugar
• Vegetable oil spray, for pan and bowl
• 1 1/2 to 2 cups shredded mozzarella cheese
• 10 cups water
• 1 large egg yolk
• 1 package instant yeast
• 48-64 pepperoni slices
• 1 1/2 cups warm water
• 2/3 cups baking soda