Smoked Salmon Omelette with White Sauce

Name: Smoked Salmon Omelette with White Sauce
Prep time: 7 min
Cook time: 8 min
Total time: 15 min
Cuisine: French
Ingredients: 2 tablespoon extra virgin olive oil; 2 large eggs; 4 tablespoons water; 2.5 ounces smoked salmon; 1/2 cup baby spinach, chopped; Gruyere cheese, aged gouda, cheddar, or parmesan cheese; Salt and pepper, to taste; 1 tablespoon salted butter or plant-based butter; 1 tablespoon all-purpose flour; 3/4 cup milk or unsweetened oat milk; Pinch of chicken stock granules (optional)