Preheat oven to 400 degrees and prepare two baking sheets with parchment paper.
In a skillet, crumble and brown the sausage, about 8 minutes.
Remove sausage and wipe the skillet.
Head the olive oil in the skillet and add the garlic and baby spinach.
Cook just until the spinach wilts and remove from heat.
Unfold the Puff Pastry sheet and roll it out just a little bit thinner than its original size. Not too thin!
Brush with sheet with egg and then begin layering the other ingredients.
Start by spreading the garlic and spinach on top. Then, add the sausage and sprinkle the cheese on top. Finish with 1/4 cup of the pizza sauce, reserving the rest for dipping.
Carefully roll up the pastry dough, starting with the shorter side.
Chill in fridge for 10 minutes and then slice into 1/2 inch pieces.
Place evenly onto the baking sheets and brush again with egg.
Bake for 15-18 minutes, or until golden brown.
Warm up the rest of the pizza sauce and serve.