In a large skillet, over medium-high heat, place beef; cook and stir until meat loses its pink color, about 3 minutes. Add frozen pierogies. Cook and stir until partially thawed, about 5 minutes. Sprinkle with taco seasoning; add 3/4 cup water.
Cook and stir until flavors are blended and pierogies are heated through, about 5 minutes. Meanwhile, arrange salad greens on a platter. Top with pierogi and meat mixture, cheese, salsa, and avocado. Makes 4 servings. Enjoy!