I made squash-apple-cheddar soup today and it is delicious....
4 tablespoons unsalted butter
1 medium onion, thinly sliced
2 medium apples, thinly sliced
1 large white potato, diced
1 1/2 cups chopped peeled butternut squash, fresh or frozen
Kosher salt and freshly ground pepper
1/2 teaspoon...