Oven-roasted pumpkin with red onion and truffle

Ingredients

• 1 pumpkin (we've used a Hokkaido pumpkin from out kitchen garden)
• 3 red onions
• 3 garlic cloves
• 4 bay leaves
• olive oil
• pepper and salt to taste
• about 2 tablespoons of honey
• a few tablespoons balsamic vinegar (optional: truffle flavored)
• 1 fresh truffle (we've used a Périgord truffle, from France, but you can also use truffle from a jar)