1. Start by combining the soy sauce, olive oil, honey, minced garlic, grated ginger, vinegar, black pepper, and sesame oil (if using) in a medium bowl. Whisk everything together until the honey dissolves and the marinade is well mixed.
2. Place the flank steak in a large resealable plastic bag or a shallow dish. Pour the marinade over the steak, making sure it’s well coated. Seal the bag or cover the dish and refrigerate for at least 2 hours, ideally overnight. This step is where the magic happens—marinating tenderizes the meat and infuses it with flavor.
3. When you’re ready to cook, remove the steak from the fridge and let it sit at room temperature for about 20 minutes. This helps it cook evenly, which is especially important with lean cuts like flank steak.
4. Preheat a grill or grill pan over medium-high heat. If you’re using a grill pan, add a little oil so the steak doesn’t stick.
5. Remove the steak from the marinade, letting excess drip off (but don’t wipe it dry!). Grill the steak for about 4-5 minutes per side for medium-rare, or longer if you prefer it more done. Look for those nice grill marks and a caramelized crust—that’s your flavor jackpot.
6. Once cooked, transfer the steak to a cutting board and let it rest for 5-10 minutes. Resting is key—it allows the juices to redistribute and keeps the steak juicy, just like my dad’s lentils that needed slow, patient stirring.
7. Slice the steak thinly against the grain and drizzle with any leftover sauce if you like. Garnish with chopped green onions and sesame seeds for a fresh, nutty finish.

One tip I picked up from my early kitchen experiments is to slice against the grain. It makes all the difference in tenderness—something I wish I knew sooner when I was first learning to cook for my family!