Combine the artichokes, spinach, pecorino, mayonnaise, red pepper flakes and garlic in a bowl. Spread on one side of the puff pastry sheet. Roll up like a jelly roll and cover tightly with plastic wrap. Place in the freezer for 30 minutes to an hour.
Preheat the oven to 350 degrees F. Spray a baking sheet with nonstick spray.
Remove the plastic wrap and slice the puff pastry log into 1-inch-thick slices. Place the pastry pieces flat on the baking sheet, about 1 inch apart from each other. Bake until puffed and golden brown, 50 minutes to 1 hour.
To ensure the best results, this recipe differs from what appears in the episode.