INGREDIENTS: 1 tablespoon unsalted butter 1 tablespoon olive oil 1 medium yellow onion, peeled and sliced 6 oz. green garlic stalks, white and pale green parts chopped 2 lbs. leeks, white and pale green parts chopped 1 russet potato, peeled and cut into 1-inch cubes Vegetable stock or water 1 1/2 lbs. sorrel 1/3 cup...Read More