Wash the meat, dab dry and season with salt and pepper. Heat oil in a pan. Brown the roast in it all around, take it out.
Wash the herbs, dab dry, remove leaves and, except for a few for garnishing, chop finely. Cut chives into fine rolls. Wash lemon, grate dry and grate peel. Halve the lemon and squeeze the juice.
Mix lemon zest, 1 tbsp. lemon juice, butter, herbs and spices. Season with salt and pepper. Use the remaining lemon juice for other purposes.
Place the roast on parchment paper and coat with the spiced butter. Seal the paper and cook in the preheated oven (electric cooker: 175 °C/ circulating air: 150 °C/ gas: see manufacturer) for approx. 1 1/4 hours (approx. 58°C core temperature).
Remove from the oven and let it rest for about 15 minutes. Remove from the paper, arrange and garnish with the remaining herbs. Pumpkin vegetables taste good with it.