I'm a pretty good scratch cook, but I just recently realized how easy it is to make spaghetti sauce from tomato paste, crushed tomatoes, whatever you've got. I was trying to explain to my husband why I felt so foolish, and he just looked at me like I was nuts. Yes, it's so stupid easy that I feel like an ass for wasting all of that money on high-end jarred sauce.
I was at work the other day, snacking on a homemade granola bar, and it was an eerily similar situation to what I'm reading in this thread. "Wait, you can MAKE granola bars?"