Using a large skillet, heat oil over medium heat.
Add the shrimp, garlic and sautée for 3 minutes or until shrimp are pink.
Using a large bowl, combine the cooked shrimp, crab, sour cream, and green onions.
Spread the tortilla chips on an aluminum foil-lined baking sheet.
Top with the shrimp mixture. Sprinkle with cheese and top with green onions
Broil for 2 minutes or until cheese melts.