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.
— Read on www.splendidtable.org/story/2000/12/12/warm-tomato-vinaigrette