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As you layer, sprinkling salt, pepper, and perhaps some fresh herbs like thyme enhances the aroma of the dish. This will not only add fragrance but will also interact beautifully with the onions as they finish cooking.
Techniques That Enhance the Cooking Process
Using a cartouche—a parchment paper lid—during the cooking process helps to contain steam and allows for the perfect balance of evaporation and caramelization. This technique, while often regarded as advanced, can easily be implemented in a home kitchen. It ensures that flavors concentrate and intensify as the dish cooks.