Step 1

Stir together ginger, garlic, chile powder, coriander, cumin, 2 Tbsp. lime juice, 1 Tbsp. oil, and 1½ tsp. Diamond Crystal or 1 tsp. Morton kosher salt in a medium bowl to create a paste. Add salmon to bowl and toss until evenly coated. Let salmon sit at room temperature 15 minutes to marinate.

Step 2

Meanwhile, mix red onion, chiles, pineapple, ½ cup cilantro, and remaining 2 Tbsp. lime juice in a medium bowl to combine; season with salt. Set pineapple-chile salsa aside.

Step 3

Heat remaining 2 Tbsp. oil in a large nonstick skillet over medium-high. Add salmon and reduce heat to medium. Cook, undisturbed, until opaque all the way through and a browned crust forms underneath, about 5 minutes. Turn over and cook until second side is browned and flesh easily flakes with a fork, about 3 minutes. Transfer salmon to a plate and flake into large pieces with a fork; squeeze a couple of lime wedges over.

Step 4

Serve salmon with pineapple salsa, cilantro, tortillas, and more lime wedges to build tacos.