Cut the swordfish steak into 16 bite sized cubes (4 used per skewer). Cut the bell peppers and onion into approximate 2" wedges (about the same size as the swordfish cubes).
Thread swordfish and vegetables onto skewers, alternating vegetables and fish. If you are grillng indoors on flat surface, no need to treat skewers. If grilling outside and using wood skewers, you will need to soak the wooden skewers for 30 minutes, (fully submerged in water) prior to adding fish and veggies, to prevent burning once over an open flame.
Heat griddle (or outside BBQ) with a tiny bit of oil on medium high heat. Once hot, add kabobs. You should hear them sizzle once they hit the grill. Cook for several minutes, then rotate kabobs to other side. Continue cooking (turning to cook all sides), and basting with additional sauce, until swordfish is seared on the outside, and cooked through (6-8 minutes). TIP: If a piece of the fish isn't fully touching the griddle, simply use a fork to lightly press it down, to ensure a crisp seared exterior. Sometimes the veggies prevent a few piecesfrom being seared on outside; this is the best way I've found to solve that issue.
Once kabobs are fully cooked through, carefully remove them from the grill, and serve! Enjoy!
Citrus Marinated Swordfish Kabobs https://www.thegratefulgirlcooks.com/citrus-marinated-swordfish-kabobs/