Fill a large pot with water and bring it to a boil. Add a pinch of salt to the water.
Add the green beans to the boiling water and cook them for about 3-4 minutes, or until they are crisp-tender. Be careful not to overcook them, as you want them to remain slightly crunchy.
Drain the green beans and immediately transfer them to a bowl of ice water. This helps to stop the cooking process and preserves their vibrant green color. Let them sit in the ice water for a few minutes, then drain them again.
In a large skillet, melt the butter over medium heat.
Add the minced garlic to the melted butter and sauté for about 1 minute, until fragrant. Be careful not to burn the garlic.
Add the blanched green beans to the skillet and toss them in the butter and garlic mixture until they are well coated.
Season the green beans with salt and pepper to taste. Adjust the seasoning according to your preference.
Cook the green beans in the skillet for an additional 2-3 minutes, stirring occasionally, until they are heated through and have absorbed the flavors of the garlic and butter.
Remove the skillet from heat and transfer the green beans to a serving dish.
If desired, garnish the green beans with a sprinkle of fresh lemon zest for a bright, citrusy flavor.
Serve the buttery garlic green beans hot as a delicious side dish alongside your main course.