Place tomatoes, garlic, and habanero, cut-side down, on a foil-lined baking sheet. Broil 20 minutes or until skins are blistered. Cool and remove skins.
Combine shrimp, mango, jicama, cilantro, and red onion in a medium bowl.
Place tomatoes, garlic, and habanero in a blender, and process until smooth. Add tomato mixture to shrimp mixture; stir to combine. Stir in olive oil. Salt to taste, cover, and chill at least 30 minutes before serving. Top with avocado slices, and serve with tortilla chips.
Besito, Huntington, New York