01 - Pat the duck breasts dry with paper towels. Score the skin in a crosshatch pattern without cutting into the meat. Season both sides generously with salt and pepper.
02 - Place duck breasts skin side down in a cold, dry skillet over medium heat. Cook 6–8 minutes, draining excess fat occasionally, until skin is golden and crisp.
03 - Flip breasts and cook 3–4 minutes for medium-rare or preferred doneness. Remove, tent loosely with foil, and rest 5 minutes.
04 - Discard most rendered fat, leaving 1 tablespoon in skillet. Add shallots and sauté 1 minute over medium heat until softened.
05 - Deglaze pan with red wine, scraping browned bits. Add stock and thyme if desired, simmer until reduced by half.
06 - Remove from heat and swirl in butter until melted and sauce is glossy.
07 - Slice duck breasts thinly and drizzle with pan sauce.