* The last few times I made this dish, in an effort to save time (and also because I just wasn’t in the mood to cook and purée yet another butternut squash), I used canned organic butternut squash purée, which I found at my local Whole Foods Market next to the canned pumpkin (which I imagine would also work as a substitute). I simply measured out 1½ cups of the puréed squash from a 15-ounce can. (You’ll probably have 1 or 2 tablespoons left over.) So easy! Alternatively, you could use frozen butternut squash purée (just thaw it before using), or, if you have fresh butternut squash on hand, you can make your own purée. Here’s how I do it:
To yield about 1½ cups of puréed squash, I start with about 3 cups (1 pound) of peeled and cubed squash (from about half of a large butternut squash). Fill a medium saucepan with an inch or two of water, then place a steamer basket (like
this one) inside the pan, making sure that the water isn’t coming up above the bottom of the steamer basket. Bring the water to a boil over high heat, then add the squash cubes to the steamer basket. Turn down the heat to medium, cover the pot with a lid, and steam the squash until soft and easily pierced with a knife, about 8 to 10 minutes. Remove the squash from the pot and set aside in a bowl to cool to room temperature. Add the cooked and cooled squash to a blender or food processor and purée until smooth, adding a couple of tablespoons of water if needed.
** You can use any combination of these cheeses that you’d like, or use all sharp cheddar if you prefer. In my recipe testing, however, I found that this combination of 1½ cups of sharp cheddar and 1 cup of Gruyère worked the best, as it balanced the sweetness of the squash and provided the best depth of flavor and the silkiest sauce. (In my experience, cheddar alone made for a slightly grainy, yet still tasty, sauce.)
*** To make the breadcrumb topping, mix together in a small bowl:
-- 1 cup fresh breadcrumbs (from about 2 slices of bread, coarsely ground in a food processor)
-- 1 tablespoon grated Parmesan cheese
-- 1 tablespoon finely chopped fresh sage or parsley (optional)
-- 1 tablespoon olive oil
Depending on the size of your baking dish (and the surface area of your macaroni and cheese in the dish), you might not need all of the breadcrumb topping. Use as much (or as little) as you'd like.