If you want a more tender green bean as opposed to a crunchy texture, place the trimmed beans in a skillet and fill with water. Then, place them in the water and turn the burner to high. Bring to a slow boil for 3-4 minutes and then drain the water. Place the hot beans in the container with the olive oil, lemon juice, chopped garlic, garlic powder, and salt and pepper. Mix until the ingredients are well combined. Allow them to marinate for 10 minutes and then grill according to the directions below.