Place the green beans and water in a large non-stick skillet over medium-high heat. Cover with a lid, and cook until the green beans are bright green but still crisp, about 2 minutes. Uncover, increase the heat to high, and cook until the water is fully evaporated, about 1 more minute.
Once all the water has cooked out, add the butter, garlic, salt and pepper and sauté, stirring frequently, until the green beans are tender with some browned spots, 2-4 minutes.
Remove from heat, squeeze lemon juice on top and serve immediately.
Notes
Storage: Kept in an airtight container in the fridge, the green beans will keep for 3 days. To reheat them, you can do so in a skillet over low heat or in the microwave until warmed through.