shallots, thinly sliced
In a large sauté pan over medium heat, heat 1 tablespoon of cooking oil. Add shallots and sauté until softened; about 3 minutes.
Add green beans, a pinch of salt, and ¼ cup water. Cover and simmer for 10 minutes until green beans are tender but firm.
Remove cover and simmer until water, if remaining, has evaporated. With a grater, remove the zest from the lemon, slice in half, and juice the lemon.
Add lemon juice, zest, Parmesan, walnuts, and salt and pepper to taste. Toss and serve.