Which ingredient is a simple side dish to the roasted chicken?

The Truffle Mashed Potato is a suitable choice as a simple side dish to the roasted chicken due to its rich, creamy texture that complements the savory flavor profile of the chicken. Mashed potatoes are traditionally a classic side dish for poultry, providing a comforting and familiar element to the meal. The addition of truffle adds an upscale twist while still maintaining the simplicity and heartiness associated with mashed potatoes, making it a great pairing.

In contrast, Potato Salad, while also a common side, can have a more complex flavor profile and texture that might not blend as seamlessly with roasted chicken. Sweet Pickles offer a distinct sweetness and crunch that may not harmonize well with the overall flavor of the chicken dish. Sesame Salt, while it can add a nice seasoning, lacks the substance typically expected of a side dish, as it is more of a condiment than a standalone accompaniment.