Fish Tacos with Cabbage Slaw and Avocado Crema | Williams Sonoma

Ingredients

• 1 ripe avocado 
• 1 cup <i>crema</i> or plain low-fat or nonfat yogurt  
• 2 tsp. plus 2 Tbs. fresh lime juice 
• 1 1/4 tsp. ground cumin 
• 1/2 tsp. salt, plus more, to taste 
• 2 cups shredded savoy cabbage or green leaf lettuce 
• 1/2 cup diced English cucumber 
• 1/2 cup diced red bell pepper 
• 1 1/2 Tbs. extra-virgin olive oil 
• 1 serrano chili, seeded and minced 
• 3 Tbs. chopped fresh cilantro 
• 2 Tbs. minced onion 
• 1 lb. halibut or other firm-fleshed white fish fillet, skin removed 
• Freshly ground pepper, to taste 
• 8 corn tortillas