Chop the onion into small pieces. Wash the spinach and chop. Set aside.

Cut open the sausage, take the sausage meat, and discard the skin.

In a pan, on medium-low heat, pour the olive oil and sauté the onion until translucent. (3-4 minutes)

On medium heat, add the sausage meat and the salt. Cook for 4-5 minutes and stir occasionally.

Add in the spinach and cook for 1-2 minutes. Remove from the heat and set aside.

Unroll your pastry on a lightly floured surface if necessary. Spread the pesto evenly.

Then, spread the sausage mixture. Leave space (1/2 inch) on the borders.

Sprinkle with the cheese.

Slowly roll your dough. Wrap in a cling wrap and refrigerate for 30 minutes. Preheat the oven to 350 degrees F.

Take your wrapped dough out of the fridge. Cut it into slices of 1/2 to 3/4 of an inch.

Place parchment paper on a baking sheet. Bake for 15 to 20 minutes.

Serve warm or at room temperature!