Sup Labu dengan Walnut Crispies

Bahan-bahan (6 porsi)

• 1 whole small pumpkin or 1 whole butternut squash (see notes)
• 1 head garlic
• a few sprigs of rosemary or thyme (I prefer thyme)
• olive oil
• 3 -4 cups chicken or vegetable broth (this depends greatly on how big your pumpkin is / how thin you want the soup)
• 1 cup half and half or cream (optional)
• 1 1/2 teaspoon salt
• 1 cup walnuts, chopped
• 1 tablespoon melted butter
• 2 tablespoons brown sugar
• 1/4 teaspoon cayenne pepper (optional)
• 1/2 teaspoon kosher salt (more to taste)
• black pepper to taste
• shredded Gruyere and kale chips (?) for topping