Bring 350 ml stock to the boil, add rice, cover and allow to swell over low heat for about 20 minutes. Wash and peel the pumpkin and remove the seeds. Cut pumpkin into cubes. Clean, wash and slice the zucchini. Peel and chop onion and garlic. Wash and seed the chillies and cut them into rings.
Caramelize sugar in a pan. Deglaze with vinegar and remaining broth and bring to the boil while stirring. Add pumpkin, zucchini, onion, garlic, chilli, clove and some cinnamon. Simmer for 8-10 minutes. Add the finished rice, braise briefly and serve immediately