Preheat the oven to 350°F and position the rack in the center. Grease a 9-inch pie pan and set it aside.
In a skillet, brown the ground beef over medium heat, adding a little oil if necessary to prevent sticking, until fully cooked. Drain any excess grease.
Stir in the taco seasoning with the cooked beef, mixing well. Transfer the seasoned beef into the prepared pie pan.
In a small bowl, whisk together the heavy cream and eggs. Add the salsa, 1 cup of shredded cheese, garlic salt, and pepper, stirring until combined.
Pour the egg mixture evenly over the taco beef in the pie pan. Sprinkle the remaining 1/4 cup of shredded cheese on top.
Bake the crustless taco pie uncovered for 35 to 40 minutes, or until the center is set and the top is golden brown.
Allow the pie to cool for 5 minutes before serving.
Add your favorite garnishes, such as sour cream, salsa, cilantro, chives, avocado, diced tomatoes, or olives, if desired. Enjoy!