"That Mundelein's population is increasingly Mexican"
Funny, as Mundelein has always had a large Mexican population. If anything, the population has decreased or at the very least been watered down with all of the new high priced subdivisions that have been built in the area over the past couple of decades.
Interestingly enough when I think of Mundelein cusine a few places come to mind; Bill's Pub & The Rainbow Restaruant. As kids we would go to Bill's pub for double decker pizza, peanuts and video games. I stopped by for a takeout a pizza a few months ago and I really don't know why I found their pizza so special as a kid, it was probably the sum of all the parts (friends, video games, etc) that made the pizza seem bettee then it really was.
I am not certain if the Rainbow is still open but this was the place the opened by eyes (and palate) to the apple pancake. It was out go to place on Saturday and Sundays when we were in the area doing errands. They always had good and cheap breakfasts and lunch.
As long as we are on topic of Mundelein you may want to take a short trip over to the Diamond Lake area and get yourself a pint at the Irish Mill. I beleive that they may have a small menu of sandwhiches and fish and chips but we used to stop in for a couple of pints and darts. The crowd is always friendly and they have the occasional Irish croner performing on nights and weekends.