Steps
1. In a small skillet, melt the butter over medium heat.
2. Add the chopped onions and sauté until they are translucent and slightly caramelized, about 4-5 minutes.
3. In a bowl, whisk together the egg, mayonnaise, milk, salt, and pepper until well combined.
4. Pour the egg mixture into the skillet with the onions.
5. Cook, stirring gently, until the eggs are softly scrambled and creamy, about 3-4 minutes.
6. Remove from heat and serve immediately.