Hasselback butternut squash is a gorgeous vegetarian dish that is a nice addition to any holiday table. Its full of fall and winter flavors like walnuts, brown sugar, and sage. With only five ingredients and one pan, this dish is much easier than it looks. It will look like it took you all day to make and is sure to impress vegetarians and carnivores alike. Hasselback is a technique of slicing a vegetable or fruit thinly while still leaving it connected, opening it up like an accordion. It's frequently used on potatoes, but works just as well with other firm, elongated veggies. In this recipe, it allows the butternut squash to get crispy while cooking evenly.