Once you get over the inherent silliness of calling such a prosaic thing as soup sexy, doesn't French onion soup seem to fit the bill? It's warm and silky, and it fills the house with the irresistable fragrance of caramelizing onions. It's filling but not too heavy, and it's the very picture of warmth, security, and comfort. That's sexy!
It's also a lovely dish for those of us dining solo on Valentine's; we love cozying up with a good bowl of onion soup and a book.
Are you serving soup for Valentine's?
• Get the recipe: French Red Onion Soup at Gourmet
Previous Soup of the Day: Chicken Soup, Four Ways
(Image: Romulo Yanes for Gourmet)