Eggplant Steaks with Roasted Cherry Tomatoes, Pine Nuts & Soubise

Onions are front and center in soubise, one of the great French white sauces. It is silky, slightly sweet, and supremely savory. We use our Cippolini onions for a nice white, but any hue of onion will suffice. The sauce pairs terrifically with all meat and fish, but we love it most served beneath oven-roasted eggplant steaks topped with roasted cherry tomatoes. It can be used in recipes that call for béchamel, like our Tarte Flambée, but it has a lighter t