The vegetable that most closely resembles the taste of an apple is the rutabaga.
Rutabagas are root vegetables with a sweet and slightly tangy flavor profile. They are often compared to apples due to their similar texture and sweetness.
While rutabagas are not as sweet as apples, they share a similar flavor complexity, with notes of both sweetness and earthiness.
You can enjoy rutabagas in a variety of ways, including roasted, mashed, or even used in soups and stews.