For the letcho, first quarter the peeled onions. Heat lard in a saucepan. Fry the onion quarters in it.
Halve the peppers, rinse and add to the saucepan cut into strips. Cut tomatoes into pieces and add them as well.
Season with salt and pepper. Peel garlic cloves and add to the cooking pot cut into slices. Steam for 15 minutes.
Peel sausage and cut into very thin slices. Put on top of the vegetables.
Stew in the closed saucepan for another 5 minutes. Season the letcho to taste.