Prepare Blackening Seasoning: In a small bowl, combine equal parts sweet paprika, onion powder, garlic powder, thyme, oregano, cayenne pepper, black pepper, and salt. Whisk these ingredients together until well-blended.

Make Cilantro Lime Sauce: In a mixing bowl, combine the zest and juice of one lime with a minced garlic clove, finely chopped cilantro, and a generous dollop of plain Greek yogurt. Stir until the mixture is uniform, then taste and adjust seasoning with salt as needed.

Prepare Pineapple Salsa: Soak diced red onion in water for 5-10 minutes to mellow its sharpness. Drain and add to a bowl with diced fresh pineapple, sliced jalapeño, lime juice, and a pinch of salt. Toss until evenly mixed.

Cook Blackened Tilapia: Heat a skillet over medium-high heat, adding a tablespoon of vegetable oil. Coat each tilapia fillet generously with the seasoning. Cook for about 3-5 minutes on each side until golden brown and flaky.

Assemble Tacos: Break the tilapia into chunks and lay warm tortillas on a plate. Fill with pieces of blackened tilapia, top with pineapple salsa and drizzle with cilantro lime sauce.