Puree a 10-ounce package thawed frozen spinach (squeezed dry), 1/2 cup milk, 2 eggs, 3/4 teaspoon salt and a pinch of nutmeg until smooth. Combine with 1 3/4 cups flour in a bowl. Transfer to a cutting board; use the back of a knife to scrape off small strips of dough. Boil 2 to 3 minutes. Remove with a slotted spoon and toss with butter, a splash of cooking water, salt and pepper.