When used in a shepherd's pie topping, how do pureed split peas improve the meal's profile compared to only using potatoes?

Offering a protein and fiber boost without significantly adding to the glycemic load

Pureed split peas can be incorporated into dishes like shepherd's pie topping as a substitute or partial replacement for starchy components like potatoes. This substitution is nutritionally advantageous because split peas are rich in plant-based protein and high in both soluble and insoluble dietary fiber. Potatoes, while providing energy, contribute primarily carbohydrates that can elevate the glycemic load. By swapping some potato mass for pureed peas, the resulting topping gains substantial nutritional density from protein and fiber, leading to a more balanced meal that supports more stable blood sugar regulation, which is inherently supportive of lower inflammatory spikes.