A movie from the 80's called "Eating Raoul." It's about this conservative couple with high dreams of a restaurant who find themselves on a different path to achieving them. Dark comedy.
I can't believe I stumped you but, to be fair, I thought long and hard for a line...so it is hardly iconic.
I can see the VHS cover in my mind's eye, but I never rented it. It was in the store I worked in at the time!