Tilapia Ceviche with Mango

Name: Tilapia Ceviche with Mango
Ingredients: 3/4 lb Tilapia; 1/3 cup Lime juice; 1 Mangos, diced; 1/2 Red onion, small, diced; 1/4 bunch Cilantro, chopped; 1 Avocados; as needed Hot sauce; for serving Tortilla chips; 1 Onions, medium, halved; 1 Jalapeno, halved, seeds removed; 2 cloves Garlic, peeled; 3/4 lb Tomatillos, husked; as needed Cooking oil; 1 English cucumber, 1/2 chopped, 1/2 diced (Sub 2 1/2 Persian or 1 regular); 1 Avocados, medium; 1/4 bunch Cilantro; 1 cup Stock, chicken (sub water); 1 Tbsp Lime juice, (more to taste)