Gammon with Roasted Pumpkin

This is a recipe adapted from the BBC and other places, and definitely modified according to what I had at home. Thus, here are the links to the actual recipes I found:
http://www.bbc.co.uk/food/recipes/gammon_with_treacle_81407
And here is my modified version:
INGREDIENTS:
1 piece gammon, big enough to be roasted for 1 1/2 hours
4-5 sage leaves
4 cups juice (I used nettle cordial + water to cover the gammon)
10 peppercorns
1 star anise
1/2 pumpkin
oil
salt and pepper
butter
3 TBS maple syrup
1 ladleful cooking liquid (from simmering)
1/4 tsp chili powder
INSTRUCTIONS:
Preheat the oven to 200C/400F/Gas 6.

1. Place the gammon in a pot. Cover with the juice (cordial + water), add sage, peppercorns and star anise, and bring to boil. Simmer for 1 1/2 hours.
2. Cut the pumpkin into quarters. Brush with oil, and place on the roasting pan, skin side down. Sprinkle with salt and pepper, and add a piece of butter on the top of each quarter. Bake for 45 minutes.
3. When the gammon has cooked, place onto the roasting pan. Brush with the maple syrup glaze and bake at 200C/400F/Gas 6 for 15-20 minutes.
4. Carve the gammon, and serve with scoops of pumpkin.