Here's an easy one.
In plastic bag, place any amount of ...
Shrimp (prawns)
Scallops
Thick pieces of white fish, such as cod, orange roughy, etc
Pour a bottled Margarita Mix over the seafood
(covering is not necessary, just enough to marinate.)
Let sit for no more than 30 minutes (flip and turn bag 2 or 3x to catch all)
Grill or broil (even microwave) for appropriate time for type and amount.
Serve with wedges of fresh lime.
This would work with chicken also.