Spinach and Artichoke Dip Rolls

Bahan-bahan (16 porsi)

• 1 container (12 ounce) frozen chopped spinach, thawed and squeezed of excess water
• 1 cup marinated artichokes, chopped
• 4 ounces cream cheese, at room temperature
• 1 cup shredded provolone cheese
• 1 cup shredded gruyere cheese
• 1 teaspoon garlic powder
• 1 teaspoon onion powder
• 1 teaspoon black pepper
• chili flakes
• 2 sheets (1 box) frozen puff pastry, thawed
• 1 egg yolk, beaten with 1 tablespoon water
• pretzel salt, for sprinkling
• 4 tablespoons salted butter
• 12 fresh sage leaves