Combine 1/2 teaspoon saffron threads with flour, salt and pepper. Dust both sides of veal scallops with seasoned flour. Brown veal in oil on both sides, about 5 minutes total. Remove veal to serving platter and keep warm.
Deglaze skillet with wine, then add lime zest, lime juice and remaining saffron. Bring lime mixture to a boil and reduce to the consistency of syrup. Stir in heavy cream, bring to another boil and stir in peppercorns. Surround veal scallops with asparagus and top with sauce.