Preheat the oven to 350°F (175°C) and spray a 9x13-inch baking dish with cooking spray.
In a large skillet over medium-high heat, cook the ground beef, breaking it up, until no pink remains.
Add the seasoned salt, taco seasoning, diced tomatoes with their juices, tomato sauce, and chopped green chiles to the skillet; stir to combine.
Reduce heat to medium-low and simmer the meat sauce, uncovered, for about 15–20 minutes until slightly thickened.
While the sauce simmers, whisk the cottage cheese and lightly beaten eggs together in a bowl until combined.
Spread half of the meat sauce in the bottom of the prepared baking dish.
Top the sauce with half of the torn corn tortillas, then spread the cottage cheese mixture evenly over the tortillas, and sprinkle with one-third of the shredded Monterey Jack.
Repeat the layers: remaining meat sauce, remaining torn tortillas, and remaining cottage cheese mixture, finishing with the remaining Monterey Jack cheese on top.
Bake uncovered for 30 minutes or until the casserole is bubbly and the cheese is melted and lightly golden.
Let the dish stand at room temperature for 10 minutes before serving, and garnish with crushed tortillas, salsa, and cubed avocados if desired.