Preheat your oven to the suggested temperature on your crescent rolls.
Open the crescent rolls and spread them out on a baking sheet lined with parchment paper or sprayed with non-stick cooking spray. Pinch the seams together to form one large rectangle. Bake in the oven for 2 to 3 minutes longer than suggested until the crescent roll crust is a golden brown.
Meanwhile, crumble and cook the ground beef in a skillet.
Add in the taco seasoning and water; let the meat simmer.
Stir together the sour cream, cheddar cheese and diced onion.
When the crescent roll crust is finished baking, spread the sour cream mixture evenly over its top and place it back in the oven at the same temperature for 3 minutes.
Remove it from the oven and evenly spoon the meat over the top of the sour cream mixture.
Evenly spread the crushed nacho cheese chips over the top of the meat.
Garnish with French salad dressing, shredded lettuce, diced tomato and/or extra onion as desired. (NOTE: I highly recommend the French salad dressing for this!)