Blackened Tilapia Baja Tacos

INGREDIENTS

• 1/4 cup reduced-fat sour cream
• 2 tablespoons chopped fresh cilantro
• 2 tablespoons fresh lime juice
• 1 jalapeño pepper, seeded and chopped
• 1 cup thinly sliced white onion
• 1 1/2 teaspoons paprika
• 1 1/2 teaspoons brown sugar
• 1 teaspoon dried oregano
• 3/4 teaspoon garlic powder
• 1/2 teaspoon salt
• 1/2 teaspoon ground cumin
• 1/4 teaspoon ground red pepper
• 4 (6-ounce) tilapia fillets
• 1 tablespoon canola oil
• 8 (6-inch) corn tortillas
• 1/2 ripe peeled avocado, thinly sliced
• 4 lime wedges