Mix together the garlic, lemon juice, and olive oil in a large bowl; set aside.
Bring a large pot of salted water to a boil. Cook the green beans in the water for 5 to 6 minutes; drain. Cool beans for about 10 minutes. Place cooled beans in the large bowl and toss with the lemon juice mixture; season with salt. Allow beans to rest for 2 minutes before stirring again. Repeat 2 minutes rest and stirring once more. Remove garlic before serving.