Pumpkin wash, core and cut into cubes (about 1.2 kg). Peel ginger and cut into thin slices. Peel onions. Wash rosemary, shake dry, pluck needles from the twigs. Boil up vinegar, onions, 1/4 litre water, sugar, bay leaf, rosemary, mustard seeds and ginger. Stir until the sugar is dissolved
Add pumpkin to the stock, bring to the boil and simmer for about 5 minutes until the cubes become glassy. Layer the pumpkin in prepared glasses. Bring the stock to the boil and pour hot over the pumpkin. Close glasses tightly
With three glasses: