Béarnaise sauce is one of my family’s absolute favorite sauces, and if I was prepared to make it every day, I’ve no doubt they’d eat it. Though the sauce for this creamy chicken tarragon is not butter, egg yolk and vinegar based like real béarnaise, it does have a very similar taste. But with this recipe you don’t have to frantically whisk the sauce right up to the moment before serving. In fact, you can easily keep this creamy chicken tarragon in the fridge or the freezer without the sauce splitting. Instead of including vinegar this sauce gets its acidity from mustard and white wine. The balance of the sour,…