How to Make It
Stir garlic, ginger, salt, black pepper, crushed red pepper, oil, and lime juice in a medium bowl. Add swordfish and gently stir to coat. Cover and marinate in the refrigerator for 1 hour.
Preheat a grill or grill pan over high. Thread swordfish, pineapple, and onion onto 16 6-inch bamboo skewers. Lightly oil grates and grill kebabs, turning occasionally, until fish is just cooked through, 3 to 4 minutes.
Serve topped with cilantro, with lime wedges alongside.