And I only learned when I had the farm already that white pepper and black pepper comes from the same peppercorn, except they're just picked at different stages. If you pick them while they're green, just as how the berries above look like, you can either consume it fresh while tasting mild and fruity or dry it for some days then crush it and mix with olive oil or brine.
On the other hand, if you missed out picking some and they've turned ripe and red on the vine, you can soak the berries in water with salt for some days. This will dissolve the outer shell and will effortlessly make the white inner seed come out. Leave it to dry and it becomes white pepper when it's ground.