Foil pouch grilled green beans w/ lemon

This is where I got this recipe:
http://www.dadcooksdinner.com/2012/07/foil-pouch-grilled-green-beans.html

Ingredients:

• 1 pound beans, ends trimmed (or any semi-tender vegetable that you can steam in about fifteen minutes; i.e., baby carrots, asparagus, broccoli)
• 1/2 teaspoon Kosher salt
• 1/2 teaspoon fresh ground black pepper
• 1 tablespoon olive oil
• 1 tablespoon water
• lemon zest (not in original recipe but sends the beans over the top!)

Directions:

1. Wrap the Beans:
Lay the pieces of foil on top of each other, and put the beans in the middle of the foil, in a pile roughly following the shape of the foil. Sprinkle the salt and pepper over the beans, then drizzle with the olive oil and water. Bring the long sides of the foil together over the top of the beans. Fold the long sides over twice, then keep folding until you have a long envelope with the foil tight against the pile of beans. Fold the open ends of the envelope a few times to seal.

2. Preheat the grill:
Prepare the grill for cooking on medium heat, then clean with a grill brush. For my Weber summit, I preheat the grill with all burners on high for 15 minutes, then turn the burners down to medium and brush the grate clean.

3. Cook the beans:
Put the envelope of beans over direct medium heat, and cook with the lid closed for 8 minutes. Flip the bag of beans, and cook for another 8 minutes. Carefully open the bag and check the beans - a bean from the middle of the pile should be floppy, and cooked all the way through. If not, seal up the envelope and cook until the beans are tender.

4. Serve the beans:
Open one end of the envelope, pour the beans onto a platter, finish off with lemon zest and serve.