01 -
Combine soy sauce, olive oil, Worcestershire sauce, lemon juice, minced garlic, honey, and rosemary in a medium bowl. Reserve 30 ml for later use.
02 -
Pat beef cubes dry with paper towels. Place in a resealable bag with the marinade, excluding the reserved portion. Remove air, seal, and refrigerate for 1 to 8 hours.
03 -
Approximately 30 minutes before grilling, toss bell peppers and mushrooms with the reserved marinade.
04 -
Clean and oil grill grates. Preheat grill to medium-high heat (200-230°C). For charcoal grills, prepare coals evenly and preheat for 5 minutes with grate in place.
05 -
Remove beef from marinade and pat dry. Thread beef, onion pieces, mushrooms, and bell peppers alternately onto skewers, with 4 to 5 beef pieces per skewer.
06 -
Place skewers on grill grates. Cook 3-4 minutes per side until all sides are seared and internal temperature reaches 52-54°C for medium-rare.
07 -
Transfer kebabs to a platter. Let rest for 5 minutes before serving.