Preheat your oven to 356°F (180°C). Line a baking tray with parchment paper.
Unroll the puff pastry sheet on a clean surface. Gently roll it out and and make a cut in the middle making it half.
Brush the surface of the puff pastry with cream cheese in one single layer.
Sprinkle the grated cheese evenly over the puff pastry.
Add olives and sundried tomatoes.
Fold the other half puff pastry sheet on top of the one with toppings, pressing down gently to seal the edges.
Brush with some egg wash (beaten egg yolk).
Sprinkle sesame seeds and nigella seeds on top.
Using a sharp knife or a pizza cutter, cut the folded pastry into strips, about 1/2 inch wide.
Take each strip and twist it several times, then place it on the prepared baking sheet.
Bake in the preheated oven for 12-15 minutes, or until the twists are golden brown and puffed up.
Allow the twists to cool slightly on the baking sheet before transferring them to a wire rack to cool completely. Serve warm or at room temperature.