Prep the Beans: Rinse frozen green beans under cold water to remove any ice. Drain well.
Cook the Beans: Heat olive oil in a large skillet over medium heat. Add minced garlic and sauté for 1 minute until fragrant. Add the green beans and water (if using), stir to combine.
Season: Season with salt and pepper. Cook for 5-7 minutes, stirring occasionally, until beans are tender-crisp.
Finish: If desired, squeeze lemon juice over the beans and toss. Adjust seasoning if necessary.
Serve: Transfer to a serving platter and garnish with optional toppings like toasted almonds, Parmesan cheese, or fresh herbs.