After removing steaks from pan, turn heat to high, add olive oil and heat until shimmering.
Add shallots and cook until softened and lightly browned, about 2-3 minutes.
Add in beef stock and bring to a boil, scrapping browned bits off bottom of pan with a spoon.
Let boil until reduced to around ¼ cup, about 10 minutes.
Add in heavy cream, brandy, red wine, and green peppercorns and cook until slightly thickened, about 3 minutes.
Add in thyme and season with salt and pepper to taste; use immediately.
