Creating the Philly Cheese Stack Omelette is straightforward if you follow these simple steps:

1. Prepare Ingredients: Gather all your ingredients and have them ready.
2. Sauté Vegetables: In a skillet over medium heat, add 1 tablespoon of olive oil. Sauté the sliced onions and bell peppers until they are tender, about 5 minutes. Remove from the skillet and set aside.
3. Cook Steak: In the same skillet, add the cooked steak and heat it until warmed through. Remove and set aside with the vegetables.
4. Beat Eggs: In a mixing bowl, whisk together the eggs and milk. Season with salt and pepper to taste.
5. Heat Skillet: Add the remaining olive oil to the skillet and heat over medium-low heat.
6. Cook Omelette: Pour the egg mixture into the skillet. Let it cook for about 2-3 minutes, or until the edges start to set.
7. Add Fillings: Once the edges are set, add the sautéed vegetables and steak on one half of the omelette. Sprinkle the shredded provolone cheese on top of the filling.
8. Fold Omelette: Carefully fold the other half of the omelette over the filling. Cook for another 2-3 minutes until the cheese is melted and the eggs are fully cooked.
9. Serve: Gently slide the omelette onto a plate and garnish with fresh parsley if desired. Cut it in half to reveal the delicious layers inside.

These steps will guide you in creating this incredible omelette effortlessly.