Trim the stem ends from 1 pound green beans. If the other ends (the pointy ends) are tough or looking a little withered, you can trim those off too. Cut the beans in half if they're very long.
Add 1 cup water to a large skillet and bring it to a boil over high heat. Reduce the heat to medium and add the trimmed green beans and half of the kosher salt. Cover the skillet and cook for 3-4 minutes, just until the beans are bright green and starting to become tender. Immediately drain the beans and rinse with cold water.
Carefully dry any excess water from the skillet, if needed. Add 1 Tablespoon olive oil to the skillet and heat over medium heat. Add the green beans, the minced garlic, the remaining half of the kosher salt, and 1/4 teaspoon freshly ground black pepper. Saute for 2-3 minutes until the green beans are hot and the garlic is fragrant and just starting to brown. Remove the skillet from heat and stir in 2 teaspoons lemon juice. Serve immediately.