For the garlic butter, peel and finely chop the garlic. Put them in a bowl together with the butter and knead with a tablespoon. Season well with salt and 1 pinch of pepper.
Roughly chop the nuts. Wash thyme, shake dry and remove leaves from the stalks. Coarsely crumble the feta.
Wash the beetroot and peel it with a small kitchen knife. Careful! Dye red beets! Therefore you should wear disposable gloves.
Halve the beetroot and cut it roughly into slices. Preheat oven (electric cooker: 200 °C/circulating air: 180 °C/gas: see manufacturer).
Cut the baking paper into four sheets (approx. 40 x 40 cm). Place approx. ¼ of the beetroot slices, nuts, feta and thyme in the middle of each sheet. Leave approx. 10 cm space to the edges. Top each with 1 tbsp. garlic butter.
Package parade! Here we go: Fold sheets of baking paper up from all sides towards the middle. Gather the ends together (looks like a small bag) and tie them tightly with kitchen string.
Place the packets on a baking tray. Bake in a hot oven for 40-45 minutes. You can serve the beetroot packets with fresh baguette, fish or steak.