3 soup with watercress puree from Recipes

unsalted butter, olive oil, sweet onion (such as vidalia or walla walla), chopped, russet potatoes (about 1 1/2 lb), peeled and chopped, celery ribs, chopped (about 2 cups), low-sodium chicken or vegetable broth, plus more for thinning soup, milk, plus more for thinning soup, sea salt, freshly ground pepper, torn watercress, rinsed and drained, chopped fresh parsley, garnishes: sour cream or creme fraiche, parsley, watercress leaves

butternut squash , halved lengthwise and seeded, kosher salt, pecans, banana , scooped into balls with a melon baller or sliced 1/2 inch thick, pure maple syrup, water, crcme fraiche, ground cinnamon, watercress sprigs