Grate Parmesan.
Mix flour, grated Parmesan, dried rosemary, pepper & salt in a bowl.
Add butter cut into cubes.
Knead everything w/ your hands until you get a smooth sticky dough.
Form somewhat like a log, wrap in cling film & roll over the surface until round & even (length approximately 20-25 cm).
Store in the fridge (fresh department!) for about 30 min.
Preheat the oven to 160° C fan.
Line 2 baking trays w/ baking parchment.
Unwrap the dough & cut into slices of about 5 mm (max).
Arrange on the baking tray (4 x 5).
Bake in the oven for about 13-15 min.
Let the shortbread cool completely before storing in an airtight container.