To get the ultimate in taste from grilled green beans, you actually have to grill them -- no foil packets needed. When you grill vegetables in foil packets, you're not grilling -- you're using the grill as a heat source for steaming vegetables. With no grill contact, you get no char and no true smoky flavor. To properly grill foods too small to stay out from the between the grates on your grill, you need a grill basket.
Trim the tips of the green beans; haricots verts, a thin, long variety of green bean, don't need trimming. Mix the beans with olive oil and secondary flavoring ingredients, such as minced garlic and diced shallots. Season the beans to taste with kosher salt, and set them aside while you set up the grill.
If you already have the grill going for steaks, burgers or other foods, simply make some room for the basket on the hot side. If you're starting the grill to cook only green beans, set it to medium-high and let it heat. Place the green beans in the grill basket; set them on the hottest part of the grill and cook them for 4 to 5 minutes, or until they reach the desired char. Finish the green beans by tossing them with a garnish, such as diced bacon, fresh parsley and lemon juice.