Tortilla Fish Soup

Name: Tortilla Fish Soup
Ingredients: 1 (2 to 3 pound) whole red snapper, scaled and gutted; 1 medium onion, quartered; 4 cloves garlic, smashed; 1 serrano chili, halved; 4 sprigs fresh thyme; 2 bay leaves; 8 whole black peppercorns; Kosher salt; 8 corn tortillas, cut into 1/2 inch strips; Vegetable oil, for frying; Kosher salt and freshly ground black pepper; 2 tablespoons extra-virgin olive oil; 1 lime, juiced, plus lime wedges for garnish; 1 medium onion, sliced, for garnish; 4 ripe tomatoes, cut into chunks, for garnish; 2 ripe avocados, peeled and cut into chunks, for garnish; Cilantro leaves, for garnish