Make-Ahead Vanilla Bean French Toast

Rich, egg-based breads like challah and brioche make the best French toast since they soak up the custard well, especially if left overnight. So assemble this dish the night before serving for an easy, breezy morning. We love adding vanilla seeds straight from the bean because they give the toast a beautiful speckled look and strong flavor, but feel free to substitute 2-3 teaspoons vanilla bean paste or 1 tablespoon pure vanilla extract.