Toss the beans with half of the vinaigrette, herbs, fennel & cheese. Season with salt (if needed) & pepper, to taste.
Melt the butter in a skillet, add the bread cubes & toss them well. Fry over low heat until brown & crisp all over, shaking the pan often so they don’t burn. Allow to cool.
Toss the greens with the remaining vinaigrette. Add the beans & croutons, toss again & serve.
Serves 4 to 6