Building a base, typically with aromatics like onions, garlic, and ginger sautéed in oil or ghee, is essential in dal and lentil dishes because it creates a foundation of flavor that permeates the entire dish, adding depth and complexity.
The base in dal and lentil dishes serves several crucial purposes. First, sautéing aromatics in fat (oil or ghee) releases their volatile compounds, creating a fragrant and flavorful foundation. This process, often called 'blooming' the spices, enhances their taste and aroma. Second, the base ingredients, such as onions, garlic, and ginger, contribute distinct flavors that complement the earthy taste of lentils. Onions provide sweetness and depth, garlic adds pungency, and ginger offers warmth and a subtle spice. Third, the base helps to build layers of flavor. As the aromatics cook, they caramelize and develop a richer, more complex taste profile. This depth of flavor is essential for creating a well-rounded and satisfying dal or lentil dish. Finally, the base helps to prevent the lentils from tasting bland or one-dimensional. Without a flavorful base, the lentils can be quite plain, but with a well-prepared base, they absorb the flavors and become a delicious and integral part of the dish.
Don't rush the process of building the base. Allow the onions to cook slowly until they are soft, translucent, and slightly golden brown. This caramelization is key to developing a deep and complex flavor. Avoid burning the garlic or ginger, as this can impart a bitter taste to the entire dish.