Roll out the puff pastry sheet over parchment paper.
Spread the basil pesto evenly on top of the puff pastry, using a spoon or a spatula.
Sprinkle the grated Parmigiano cheese on top as well.
With a knife or with a wheel cutter, cut the puff pastry into strips large about 1 inch / 2.5 cm.
Fold the strips to make the Christmas tree shape. You can leave the puff pastry as it is or add a skewer in the middle as I did.
Bake the snacks in the preheated oven for 10-15 minutes or until golden.
Notes
Check out this recipe if you want to make Basil Pesto from scratch.You can add a cut-out star made of cheese of top of the tree for further decoration.