Hasselback is the way to cut the product (ingredient), into thin slices, adding between the cuts some things, which gives the flavor and aroma to the dish during cooking. For example:

Hasselback Butternut Squash with a Sweet and Spicy-Glaze, Thyme and Nuts

You can also cook potatoes this way (Swedish cuisine), cut halfway through into thin slices and on top add breadcrumbs, butter and/or nuts. You also can cook Hasselback chicken breast, adding to the cuts some herbs, fruits, vegetables, spinach with goat cheese, and etc. It turns out fragrant, juicy, and very tasty. And for dessert, for example, apples Hasselback with a glaze of cinnamon, butter, brown sugar, sprinkled with nuts, chocolate, or oatmeal, and served with ice cream or whipped cream.