
Cut tenderloin crosswise into 12 equal rounds. Pound beef rounds to flatten to generous 1/4-inch-thick medallions. Season lightly with salt and pepper.
Melt 2 tablespoons butter in heavy large skillet over medium-high heat. Working in batches, sauté beef in skillet until brown on outside but still pink in center, about 2 minutes per side. Transfer beef to plate. Add remaining butter to same skillet. Add garlic, shallots and thyme;
sauté until tender, about 3 minutes. Add flour; stir 1 minute. Add broth and wine. Boil until sauce thickens and is reduced to 1 1/4 cups, stirring occasionally, about 12 minutes. Return beef and any collected juices to sauce in skillet; heat through, about 1 minute.
Transfer beef to plates, Spoon sauce over.