Butternut Squash with sourdough

2 tablespoons unsalted butter 4 cups thinly sliced onions 1 1/4 lbs butternut squash, peeled,seeded and cut into 1/4 inch slices 1 1/4 lbs yukon gold potatoes[...]

1 pound sourdough bread 1 loaf, crusts removed, cut in 1/2-inch cubes, about 10 cups * 1/3 cup pumpkin seeds 2 3/4 teaspoons butter divided 2 tablespoons[...]