Blanch the green beans. Do this by boiling the green beans for 5 minutes then plunging them into ice water. Drain the water.
Heat the olive oil in a skillet over medium-high heat. Cook the garlic for 1 minute then add the green beans. Season generously to taste with salt and pepper. When the green beans are hot, add the lemon slices and cook for 1 minute before removing from the heat and serving.
Recipe by Lemon & Mocha at http://www.lemonandmocha.com/2018/11/20/lemon-garlic-green-beans/