01 - Heat the vegetable oil in a large non-stick skillet over medium-high heat. Add the thawed hash browns, season with salt and pepper, and cook for 12–15 minutes, flipping occasionally, until golden and crispy. Divide among four serving bowls.
02 - In the same skillet, add the breakfast sausage. Break it up with a spatula and cook for 5–7 minutes, until browned and cooked through. Drain excess fat if necessary. Spoon the sausage over the hash browns.
03 - Whisk the eggs, milk, and salt together in a bowl. Heat the butter in a clean non-stick skillet over medium heat. Add the eggs and cook, gently stirring, until just set and fluffy, about 3–4 minutes. Spoon the scrambled eggs into the bowls.
04 - Top each bowl with shredded cheddar cheese, diced tomatoes, green onions, and avocado slices. Add hot sauce if desired. Serve immediately while hot.