Cocktail Hour Appetizers

I am getting a family friend who is just starting out with catering to cater the food at the wedding so they don't have menus or anything and they are able to do whatever we are wanting within reason. I was thinking sticking with the Mexican theme for cocktail hour should probably be best...?

Rather than sticking to the Mexican food theme, you may want to diversify with your cocktail hour. That way if there are any guests that aren't fans of that particular type of cuisine, they will have other options during cocktail hour. Maybe go with easy favorites like finger sandwiches, meatballs, mac n cheese bites, mini corn dogs, etc. And charcuterie boards and fruit/cheese trays are always a hit.

I really like Jm Sunshine's and Skylar's themed ideas. Chinese food flavors also work well with Mexican food, slight shared history. I'd look into shumai, dumplings, other small bites (not noodles). I would also have a vegetarian entree selection for non-meat eaters. Some vegan chefs use jackfruit for tacos and pulled "pork" sliders.