Fish Tacos with Broccoli Slaw and Lime Cream Sauce

Name: Fish Tacos with Broccoli Slaw and Lime Cream Sauce
Ingredients: 4 cups (8 oz./250 g) prepared broccoli coleslaw; 1/4 cup (1 1/2 oz./45 g) minced red onion; 1/4 cup (1/3 oz./10 g) minced fresh cilantro; 1 Tbs. plus 2 1/2 tsp. fresh lime juice; 1 serrano chile, seeded and minced; Kosher salt and freshly ground black pepper, to taste; 6 Tbs. (3 fl. oz./90 ml) gluten-free mayonnaise; 6 Tbs. (3 oz./90 g) plain Greek-style yogurt; 1/2 tsp. finely grated lime zest; 1 lb. (500 g) albacore tuna, cut into 3/4-inch (2-cm) cubes; 3/4 tsp. ancho chile powder; 1/4 tsp. ground cumin; 1/4 tsp. ground coriander; 2 Tbs. olive oil; 1 large avocado, peeled and sliced; 8 to 10 gluten-free corn tortillas, heated