Wash potatoes thoroughly, peel if necessary and cut in half lengthwise. Quarter peppers, clean and wash.
Preheat oven (electric cooker: 175 °C/circulating air: 150 °C/gas: level 2). Spread a thin layer of oil on a baking tray. Place potatoes and peppers, except for 1 quarter, on top. Spray or sprinkle potatoes with 1 tsp. oil.
Season with salt and pepper. Bake in a hot oven for about 45 minutes.
Meanwhile, roast pumpkin seeds in a pan without fat and remove. Peel garlic. Grate parmesan. Take the peppers out of the oven after 20 minutes, let them cool down a bit. Peel the skin.
Pumpkin seeds, except for some roasted peppers, garlic, parmesan and 1 teaspoon of oil in a blender. Season to taste with salt, pepper and vinegar. Dice fresh peppers finely. Serve the potatoes with the pesto.
Paprika cubes and rest of pumpkin seeds sprinkle over it.