Wash the potatoes and cook in boiling water for about 20 minutes. Drain potatoes, quench, peel and let them cool down
Clean, wash and cut the peppers into strips. Sort spinach, wash, shake dry and chop roughly. Peel onion and garlic. Cut onion into strips, chop garlic. Cut potatoes into slices
Heat 4 tablespoons of oil in an ovenproof pan (28 cm Ø). Fry the potatoes for about 12 minutes, turning them over. Season with salt, pepper and cayenne pepper. After about 8 minutes add paprika, onion and garlic. Dice cheese. Fold spinach and cheese into the potato mixture
Whisk eggs, milk, approx. 1/2 teaspoon salt and a little pepper. Pour egg-milk over the potato and vegetable mixture. Cover and let it simmer at low heat for about 10 minutes. Cook in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: see manufacturer) for 20-30 minutes.
Wash the parsley, shake dry, pluck the leaves from the stalks and, except for something to garnish, chop. Pour capers into a sieve, drain and chop coarsely. Mix parsley, capers and 4 tbsp. oil. Season with salt and pepper. Take the finished tortilla out of the oven, let it rest in the pan for about 5 minutes and turn it out of the pan. Spread the parsley-capers mixture on top and garnish with parsley
Waiting time approx. 1 hour