Preheat oven to 350 degrees F. Spray a 9 x 13-inch baking dish with cooking spray and set aside.
Cook beef and onion in a large skillet over medium-high heat until meat is no longer pink (about 5-7 minutes). Drain.
In a separate bowl, stir together condensed soup, milk, taco seasoning and salt.
Add cooked rice, soup mixture, tomatoes and corn to the cooked beef. Stir to combine. Transfer to prepared baking dish. Sprinkle cheese over top.
Bake, uncovered, at 350 degrees F for 25-30 minutes, or until hot and bubbly. Top with crushed chips, allow to rest for 5 minutes, and then garnish with parsley, green onion or cilantro just before serving.
