It doesn’t get much simpler than this, strips of smoked Salmon and a creamy, herby spread atop crisp croutons. You could use other herbs such as chervil or French tarragon, replace the crème fraiche with cottage cheese or ricotta and use hot-smoked Salmon or trout if you prefer. The components can be prepared well ahead of time, but don’t combine them any more than half an hour before you’re ready to serve or the spread will soften the croutons.