Easy Fish Tacos

Ingredients

• 1 medium mango, cubed
• 1/2 cup avocado, cubed
• 1/4 cup red onion, chopped, plus more, to taste, sliced, for serving
• 2 tablespoons jalapeño, seeded and chopped
• 1 tablespoon fresh cilantro, minced
• 3 teaspoons olive oil, divided
• 1 teaspoon lemon juice
• 1 teaspoon honey
• 1 pound halibut steaks, 3/4-inch-thick each
• 1/2 teaspoon salt
• 1/4 teaspoon pepper
• 4 bibb lettuce leaves
• 4 (6-inch) flour tortillas, warmed
• 4 teaspoons sweet Thai chili sauce, optional, for serving