01 - Heat vegetable oil in a large non-stick skillet over medium-high heat. Add thawed hash browns, season with salt and pepper, and cook for 12 to 15 minutes, flipping occasionally, until golden brown and crispy. Divide the crispy hash browns evenly among four serving bowls.
02 - In the same skillet, add breakfast sausage and break apart with a spatula. Cook for 5 to 7 minutes until browned and completely cooked through. Drain excess fat if needed and spoon the sausage over the hash browns in each bowl.
03 - Whisk together eggs, milk, and salt in a mixing bowl until well combined. Heat butter in a clean non-stick skillet over medium heat. Pour in egg mixture and cook, gently stirring with a spatula, until just set and fluffy, about 3 to 4 minutes. Spoon scrambled eggs into the bowls.
04 - Top each breakfast bowl evenly with shredded cheddar cheese, diced tomatoes, sliced green onions, and fresh avocado slices. Add hot sauce to taste if desired.
05 - Serve the hash brown breakfast bowls immediately while hot for the best texture and flavor experience.