Cut your fresh or thawed tilapia into 1-inch pieces. Place in a bowl and drizzle with olive oil. Toss to coat.
Add blackening seasoning & a sprinkle of salt and toss again to evenly coat all the fish.
Preheat a skillet over medium heat. When hot, spray with Pam and add fish. Lay in a flat layer and don’t overcrowd the pan or the fish will steam, not sear.
Don’t move fish for 3 minutes once you’ve placed them in the hot pan — this helps get a good browned (or blackened in this case!) crust. Flip them after 3 minutes and cook for another 1-2 minutes, until just cooked through. Remove from heat.
Meanwhile, heat another skillet over medium heat to heat tortillas, or heat them in the microwave. I like to heat them in the skillet because they’re more pliable and less breakable than heating them in the microwaving.
Fill tortillas with tilapia and top with plenty of crunchy cabbage and cilantro. Serve with salsa, guacamole and a wedge of lime.