Prep Time 20 minutes mins
Cook Time 15 minutes mins
Resting Time 5 minutes mins
Total Time 40 minutes mins
For easier rolling, chill the butterflied steak in the freezer for 10–15 minutes before pounding so it firms up slightly. If your steak is thick or uneven, split it horizontally with a knife before pounding to achieve a uniform thickness that cooks evenly. Pat the spinach dry to avoid excess moisture, and don’t overfill so the roll seals well. Searing in a very hot pan builds flavor; if the exterior threatens to burn before the interior reaches temp, finish gently in a 350°F oven. Always slice across the grain for tender bites, and use an instant-read thermometer to avoid overcooking.