Avocado Chicken Corn Chowder

Name: Avocado Chicken Corn Chowder
Ingredients: * 1/2 medium white onion, diced; * 4 garlic clove, unpeeled; * 1 serrano pepper; * 4 large avocado, cut in 1/2, seed removed and peeled; * juice and zest of 2 medium lime; * 1 1/2 c (13.5 ounce can) coconut milk; * 1 tsp ground cumin; * 1tbsp coconut oil; * 1 tsp sea salt, or to taste; * 1 tsp ground black pepper, or to taste; * 4 cup chicken broth; * 1 1/2 c sweet corn (canned or frozen and thawed - fresh if in; season); * 2 grilled chicken breast, shredded ( about 3 cup); for garnish; * 4-5 corn tortilla