Preheat oven to 400°F (200°C).

In a mixing bowl, combine cream cheese, sour cream, Parmesan cheese, garlic, salt, and pepper until smooth. Stir in spinach and artichoke hearts.

Roll out the puff pastry into a rectangle on a lightly floured surface. Spread the spinach and artichoke mixture evenly over the pastry.

Roll the pastry tightly from the long end, like a jelly roll. Slice the roll into 1-inch-thick pieces.

Place the slices, cut side up, on a baking sheet lined with parchment paper. Brush the tops with beaten egg.

Bake for 15-20 minutes or until golden and puffed.

Serve warm.