Prep Grill: Prepare grill for direct cooking using lump charcoal. Target an internal grill temperature of 400 - 450 degrees F. For a gas grill, prepare two burners at medium to medium-high heat.
Season: In a large bowl, combine green beans, olive oil, kosher salt, and pepper. Toss to combine.
Grill Direct: Place green beans perpendicular to grate over direct heat for 5 to 6 minutes or until a slight char and then flip. Cook over direct heat another 3 - 5 minutes and remove.
Grill Lemon: At the same time as green beans, place the two halves of lemon flesh side down over the direct heat and grill for 10 minutes or until slightly charred.
Serve: Add the finished green beans to your serving dish. Squeeze grilled lemon juice over the finished green beans. Top with a small bit of finishing salt or freshly shaved Parmesan cheese.
Notes
Prep: There is no need to soak green beans in salt water prior to cooking. Nor do you need to blanch.Optional Finish: Consider adding some freshly grated Parmesan cheese for a nice salty bite.