Youll have to lodge the end of the sticks in the ground, you cant do it on this surface, it will tip over easily. Do it on dirt. Also get a stronger rope and tie the top through and through very well.
Broiling is the correct answer
What are you trying to ask? Like the style ?
Aromatics like garlic, onion, or shallots provide a deep flavor base on which other flavors can be built. Herbs and spices, either dried or fresh, can be added to the marinade for extra layers of flavor. Salt is also an important part of the seasoning process. Salt helps magnify the other flavors added to the marinade.