I made this recipe for Roasted Yam and Onion Soup the other day and it was FANTASTIC! I could have eaten bowl full after bowl full all night long.
I roasted the onions along with the yams, and then sliced them and sauteed per instructions. And I didn't add any cream or milk, it didn't need it at all. The only drawback to this soup is that it has no protein in it at all. So I would have it as a first course in a larger meal and pair it with roast chicken or well, anything really, it's so yummy.
I like that it makes use of winter vegetables also.