Ahi Tuna Tacos with Pineapple Salsa

Name: Ahi Tuna Tacos with Pineapple Salsa
Ingredients: 2 tablespoons ground black pepper; 2 teaspoons salt; 2 teaspoons ground cumin; 2 teaspoons garlic powder; 2 teaspoons ground cinnamon; 1 pound ahi tuna steaks; 2 tablespoons olive oil; 4 tablespoons fat-free sour cream; 4 (10 inch) flour tortillas, warmed; 0.5 whole fresh pineapple - peeled, cored, and diced; 0.5 medium red onion, diced; 2 tablespoons chopped fresh cilantro, or to taste; 2 tablespoons lime juice; 1 tablespoon crushed red pepper; 2 teaspoons grated lime zest