This is a basic vinaigrette only instead of being cold, it's mixed together in a medium hot pan, which intensifies the flavor of the tomato and the sweetness of the shallot. This is a great sauce for white fish, halibut or cod or tilapia (and would do wonders for the ubiquitous boneless chicken breast). But it also it works well with boiled new potatoes, salt cod, or a combination of boiled new potatoes, or other root vegetables, and salt cod or smoked trout.
My friend Didier Frayssou, a wine master who can match any dish to its soul-mate wine, has a quality I adore in French men: a sophisticated palate and a love of his mom's home cooking. I don't think I'd known him five minutes before he started telling me about his mother's farçous, a type of crepe or galette that's loaded with greens, most especially Swiss chard. Didier comes from Laguiole in the Auvergne, but farçous are a staple throughout Southwest France, where all the moms have their own way of making them.