Place green beans in a large saucepan with water and salt. Bring to a boil, then reduce heat to medium-low. Cover and simmer about 3 to 5 minutes, or until beans are crisp-tender. Drain water from pan.
Melt butter in a small skillet over medium-low heat. Add almonds and saute until golden brown (about 5 to 7 minutes).
Add almonds to green beans. Stir in the lemon juice and black pepper. Serve.