Ingredients:

• 1/4 cup warm water
• 1 (.25-ounce) package (2 1/4 teaspoons) active dry yeast
• 3 1/2 cups (451g) all-purpose flour, divided, plus more if needed
• 1 teaspoon salt
• 8 tablespoons (113g) unsalted butter, divided
• 2 tablespoons honey
• 3/4 cup buttermilk
• 1 large egg
• 8 to 9 ounces (about 144 slices) thinly sliced pepperoni