Bring large saucepan of water to a boil on high heat. Add the salt and green beans. Cook until tender-crisp, 4 to 5 minutes. (See steaming instructions in Step 4).
Meanwhile, melt butter on medium heat in large skillet. Cook until butter begins to brown lightly, about 3 minutes. Stir in lemon juice.
Drain beans; add to skillet, tossing to coat with butter mixture. Heat through. Season with additional salt and fresh ground black pepper.
To Steam: Fill a large pot with 2-inches of water and place a steamer inside. Bring water to a boil. Add string beans and cover for 5 minutes, or until beans are cooked throughout but still crisp to the bite. Continue with Step 2.