Mix a cup of rice with 1 1/2 cups of water and add about 1 teaspoon of vegetable stock. Bring to the boil and then turn off the hotplate, leave to soak for about 15 minutes with the lid closed.
In the meantime, cut the peppers into small pieces and first halve the zucchini and then cut into approx. 0.5 cm thick slices. Finely dice the onion.
Heat the butter in a large pan or saucepan and briefly sweat the onions, add the minced meat, season with salt and pepper and fry. Add the cooked rice and the remaining vegetables.
Add another 250 ml water and let the rice soften with the lid closed. Finally, season again with salt, pepper and vegetable stock.