Rinse fish, dab dry and cut into 12 slices. Sprinkle with lemon juice, season with salt and pepper.
Preheat oven (electric cooker: 175 °C/circulating air: 150 °C/gas: see manufacturer). Wash thyme, shake dry, remove leaves. Wash potatoes thoroughly and cut in half. Mix with 2-3 tbsp. oil, half of the thyme and 1 tsp. salt.
Line a baking tray or a fat pan (deep baking tray) with baking paper, spread potatoes on top. Bake in a hot oven on the lower shelf for 45-50 minutes.
For the fish bombs clean, wash and chop the peppers. Peel and finely dice the onions. Peel garlic and chop finely. Mix everything with remaining thyme and olives, season with salt and pepper.
Tear off or cut four large pieces of baking paper (approx. 38 x 42 cm). Add 1⁄4 paprika mixture and place 3 fish slices on each. Take up each of the four paper corners and tie them together with kitchen string to form a small bag.
Place the fish bombs on an oven rack, slide them over the potatoes in the oven 20-25 minutes before the end of the baking time and bake with them.
Meanwhile peel skin from the chorizo. Cut the sausage into thin slices. Heat 1 tablespoon of oil in a frying pan. Fry the sausage until crispy.
Take fish parcels out of the oven, open them and arrange them with potatoes. Cover the sausage with some frying fat and sprinkle with sea salt. Possibly add lemon slices.