Peel the cucumber and halve it lengthwise. Scrape out the seeds with a teaspoon. Cut cucumber diagonally into eight pieces. Steam in hot oil for five minutes. Clean, wash and dice the peppers. Peel and finely chop the onion. Take the cucumber out of the frying fat and fry the onion and minced meat.
Add paprika and cook for three minutes. Stir in tomato paste. Season with salt, pepper and rosemary. Grate cheese. Fill the minced meat into the boats, sprinkle with cheese. Put two in a small casserole dish. Pour a little broth on each and bake in a preheated oven (electric: 200 °C/ gas: level 3) for ten minutes