Place eggs, lemon juice, chili powder and garlic into a bowl or food processor; process 30 seconds or until combined. with processor running, add oil in slow, steady stream until well combined. Add Parmesan and a pinch of salt and pepper; process until combined. Set aside!
In medium bowl, combine chicken and taco seasoning.
place romaine in large bowl. Toss with dressing to coat lightly; divide among 6 salad bowls or plates. top equal amounts of chicken, tomato, cheese and tortilla chips. Serve immediately.