Yes, you can cook on your engine!! And it tastes fantastic!!  See the picture at left of the chef with his creation, which literally took miles of effort.
This method of cooking is perfectly safe!  Plus, if you get into traffic near the game, you can smell the shrimp cooking.  This is great because you'll have hot food immediately upon arrival, without waiting to fire up the grill.
 

Time Required:  15 minutes prep time, plus a 90 minute drive

Skill Required:  Minimal cooking skills needed; excellent driving skills required

Ingredients:

1 pound shrimp, peeled and cleaned
Olive oil
Salt, pepper, Old Bay
2 pats butter
2 bay leaves
2 tablespoons lime juice
Aluminum foil
1 car or truck
Steps:

Lay out three layers of aluminum foil, big enough to wrap your shrimp
Brush the top layer with olive oil
Place shrimp in center of foil
Season with salt, pepper, and Old Bay
Add 2 pats of butter, 2 bay leaves, and 2 tablespoons of lime juice
Wrap tightly and refrigerate overnight to marinate
Drive your car for about 20 miles and pull over.  Feel around the engine for the hottest spot.
Wedge the shrimp into the hottest part of the engine.  You might need to ball up some extra foil to fill gaps.
Drive for about an hour.  Your shrimp will be perfect!!