Preheat Oven: Preheat your oven to 350°F (175°C) and ensure the oven rack is in the center position. Grease a 9-inch pie pan and set it aside.
Cook the Ground Beef: In a skillet over medium heat, brown the ground beef, adding oil if necessary to prevent sticking. Cook until the beef is fully browned, then drain any excess grease.
Season the Beef: Add the taco seasoning to the browned ground beef in the skillet. Stir to combine evenly, then spoon the seasoned beef into the prepared pie pan.
Prepare the Egg Mixture: In a small bowl, whisk together the heavy cream and eggs until smooth. Add the salsa, 1 cup of shredded cheddar cheese, garlic salt, and black pepper, and stir to combine.
Assemble the Pie: Pour the egg mixture over the taco beef in the pie pan, ensuring it covers the beef evenly. Sprinkle the remaining ¼ cup of shredded cheddar cheese on top.
Bake: Place the pie pan in the preheated oven and bake uncovered for 35 to 40 minutes, or until the center is set and the top is golden brown.
Cool and Serve: Allow the crustless taco pie to cool for 5 minutes before slicing and serving. Add optional garnishes like sour cream, salsa, cilantro, chives, avocado, diced tomatoes, or olives, if desired. Enjoy!