In a bowl, toss together the olive oil, garlic, shallot, red pepper flakes and green beans, making sure each green bean is evenly coated with all the seasonings.
Place the green beans on the grill plate/basket and transfer that to the grill over the flame. Grill the green beans for about 5-6 minutes until they are just charred slightly and soft.
Using tongs, carefully remove the grill plate/basket from the grill and squeeze the lemon on top of the green beans.