In a medium bowl, crack open the eggs and add milk and a pinch of salt. Whisk until fully incorporated.

Heat butter in skillet over medium-low heat. Add onion, bell pepper, and mushrooms. Sauté for about 5 minutes.

Stir in cooked bacon, distributing evenly. Cook for another 2-3 minutes.

Pour whisked eggs into skillet, allowing them to sit for 30 seconds.

Gently stir the eggs, scraping edges toward center, for about 2-3 minutes.

Remove from heat and sprinkle cheese over eggs, add chives if desired.

Serve onto plates with options like toasted bread or avocado.