Butternut Squash With Pistou without roast carrot

1 tablespoon butter 1 tablespoon olive oil 2 large onions , chopped into 1-inch squares (about 4 cups) 3 tablespoons fresh sage , chopped or 1 tablespoon[...]

2 lbs butternut squash, peeled 1 1/4 lbs idaho potatoes , peeled (I used sweet potatoes) salt & freshly ground black pepper 6 tablespoons grated parmesan[...]

1 1/2 cups coarse fresh breadcrumbs 2 tablespoons butter , melted kosher salt (coarse) 3/4 cup grated sharp cheddar cheese 1 teaspoon fresh thyme leave 1 Make[...]