Cook rice according to package directions, omitting salt and fat.
. Heat oil in a large nonstick skillet over medium heat. Add onion and garlic, and sauté 2 minutes or until tender. Add cooked rice, beans, and Mexican seasoning; cook 5 minutes or until thoroughly heated. Set aside.
. Combine lettuce and next 4 ingredients in a large bowl. To serve, place 5 chips on each of 6 plates; top with salad mixture and bean mixture. Drizzle dressing over salads.