Clean and wash the peppers and cut them into cubes separately. Peel and finely dice onions. For the green relish, heat 2 tablespoons of oil. Fry half the onions in it until transparent. Add green pepper cubes and peppercorns and fry everything covered for 4-5 minutes.
In the meantime, clean, wash, seed and finely chop the chilli pepper for the red relish. Heat the remaining oil. Sauté the remaining onions and chilli in it. Add the red pepper cubes and fry everything covered for 4-5 minutes.
Mix the red and green relish with 6 tablespoons of vinegar, 4 tablespoons of water, about 1/2 teaspoon of salt and 2 teaspoons of sugar. Cook for about 40 minutes while stirring until the mixture thickens.
Season to taste with salt and pepper. Puree if necessary. Pour hot into prepared glasses, close and let cool.