kabocha is my favorite by far. muscat comes in second. 1 large kabocha, sliced, peeled, then cubed 3 leeks, whites only, sliced water to cover salt boil for 20 minutes or so. ladle solids into blender with just enough liquid to keep things moving. return to pot, adjust consistency to taste with remaining liquid (save some for later; it's delicious), check seasoning. this version is vegan and doesn't really need anything else, but you can spruce it up with pancetta and cream, herbs, spices, stock instead of water, etc.