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 12–15 minutes, flipping occasionally, until golden and crispy. Divide among four serving bowls.
02 - In the same skillet, add breakfast sausage. Break 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 eggs, milk, and salt together in a bowl. Heat butter in a clean non-stick skillet over medium heat. Add eggs and cook, gently stirring, until just set and fluffy, about 3–4 minutes. Spoon 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.
05 - Serve breakfast bowls immediately while hot for best texture and flavor.