Despite the fact that 90% of what I ate was home cooked, mostly from scratch, meals, I managed to miss out on some basics like courgette (zucchini) and aubergine (eggplant) and BUTTER if you can believe it.
My mother was big on margarine. So when I moved out I continued the tradition until one day I made a fateful mistake. It was like in Ratatouille. I was sat in my studio just eating buttered bread having an out of body experience.
Eggs. I was always told I was allergic and they grossed me out so I never had a desire to challenge that but my roommate in college convinced me to try them. So good in so many ways.