Remove the sirloin steaks from the refrigerator and let them sit at room temperature for about 30 minutes.

Pat the steaks dry with paper towels. Rub each steak with 1 tablespoon of olive oil and season generously with salt, black pepper, and smoked star anise powder.

Preheat a grill or grill pan over medium-high heat. Place the green onions on the grill and char for about 2-3 minutes per side until tender and marked. Remove and set aside.

In the same grill or grill pan, add the seasoned sirloin steaks. Cook for about 4-5 minutes on one side, then flip and cook for an additional 4-5 minutes for medium-rare or until desired doneness is reached.

Remove the steaks from the grill and let them rest on a cutting board for at least 5 minutes.

In a small saucepan over medium heat, melt the butter. Add the chopped shallots and sauté until golden brown, about 5-7 minutes. Stir in fresh thyme and balsamic vinegar, seasoning with salt and pepper.

Slice the rested sirloin steaks against the grain. Arrange on a serving platter, drizzle with the caramelized shallot butter, and top with charred green onions. Garnish with fresh herbs if desired.

Serve immediately with your choice of sides and enjoy the rich flavors!