A light but surprisingly rich onion soup. Suitable for a simple lunch or dinner if served with a hearty bread (sourdough is best) and a salad and some milk, or use it as the soup course for a big dinner and impress everyone. My dad calls it "country style" because he was served something very like it (although, he thinks, made with chicken or beef stock) while staying with friends in the French countryside. Try to find butter with the ingredients "sweet cream" or "cream, salt" (but unsalted is better); it will taste much better. Use home-made veggie stock if possible, or, if you must, canned, but taste carefully before salting in that case! Substitute chicken stock for more protein and a richer taste.