Drain the corn. Cut the onions into thin slices and the garlic into fine leaves. Scald tomatoes, peel, quarter and core. Cut the zucchini into 1/2 cm thick slices. Finely chop the oregano, cut the chives into rolls.
Sweat the onions, Knofi and oregano in a saucepan in 3 tablespoons of oil. Admit the mince, fry. Stir in tomato paste. Season with salt, pepper and cayenne pepper. Pour in the stock, simmer for 5 minutes.
Fry the zucchini in the remaining oil until al dente. Add tomatoes to the meat, simmer for 2 minutes. Fold in the zucchini and season again.
Fill the stew into deep plates and serve with a dollop of creme fraiche and chives.