Soak the Skewers: Soak wooden skewers in water for at least 30 minutes to prevent burning on the grill.
Prep the Steak: Cut steak into 1-inch cubes and place them in a Tupperware or sealable container.
Add Marinade: Zest and juice one lime, then add both to the container.
Add Cilantro & Marinate: Finely chop a handful of cilantro and mix it in with the steak. Stir well to coat. Cover and refrigerate for at least 4 hours to let the flavors develop.
Prep the Mango: Cut the mango into 1-inch chunks. Use a semi-firm mango so the pieces hold their shape on the grill.
Bring Steak to Room Temp: Remove the steak from the fridge about 20–30 minutes before grilling to let it come closer to room temperature.
Assemble Skewers: Alternate steak and mango chunks on each skewer, pressing pieces together gently to hold.
Grill: Heat your grill to high. Grill skewers for about 2 minutes per side, or until the steak is nicely seared and cooked to your liking.
Serve & Enjoy: Serve hot, as-is or with a squeeze of extra lime. These are perfect with rice, grilled veggies, or wrapped in warm pita.