04
Melt the butter in a saute pan. Add the shallots and the prosciutto and saute for one minute. Add the cream and bring to a simmer. Add the tarragon and salt and pepper and cook, stirring, for five minutes, or until the sauce has thickened slightly. Add the asparagus and fava beans and heat through. Keep the sauce warm until the fettuccine is cooked.
05When the fettuccine is al dente, drain it and transfer it to a heated serving bowl. Add the sauce, toss and serve. Pass freshly grated Parmesan cheese separately.