Preheat oven to 350°F (175°C).
Lightly brush or spray the cut sides of the English muffins with olive oil. Place them cut side up on a baking sheet and toast until lightly golden. Remove and set aside.
Grease 4 ramekins with olive oil. Crack one egg into each ramekin, then add 3 tablespoons of egg whites. Gently whisk with a fork to combine.
Sprinkle each with green onion.
Bake for 10–12 minutes, or until the eggs are just set.
While the eggs bake, cook the turkey sausage patties according to package instructions.
Assemble the High Protein Breakfast Sandwiches: place the baked egg on the bottom half of each muffin, top with sausage, cheddar cheese, and the muffin top. Serve warm.