INGREDIENTS
3 1/2 lb
butternut squash, peeled and cut in 1/4-inch-thick slices (about 6 cups)
5 tbsp
unsalted butter, plus more for the pan
1 tbsp
extra-virgin olive oil
2
large yellow onions, trimmed, peeled and chopped (about 3 cups)
1 cup
whole or low-fat buttermilk
2
large eggs, beaten
2 1/2 tsp
minced fresh thyme
1/2 cup
bread crumbs, toasted
3/4 tsp
kosher salt
1/2 tsp
freshly ground black pepper
1/4 cup
pumpkin seeds or pecans, toasted
2 cups
coarsely grated cheddar cheese (about 6 ounces)
Optional: 4 to 6 large handfuls of fresh spinach, washed and stemmed (add to the same water as the squash in step 2 during the last minute of boiling)