I personally do not have many foods that I prefer not to eat, but my spouse does. He has a negative physical reaction to eating most vegetables, mostly because the texture is something he can't tolerate. He feels bad about it and wishes he was more adventurous in his eating, but he is not. I'm perfectly o.k. with this because it is his eating issues.
Sometimes, people ask me about his eating and ask me if I ever sneak vegetables or other things into his food. I get greatly offended at this. I personally find it incredibly rude to sneak an adult food that they don't want to eat for any reason. It could be an allergy, it could be a personal belief, or it could be just a general dislike of a food. When people ask me this - I often turn it around and ask if they would find it o.k. to sneak meat into a vegetarian dish or to sneak pork or shrimp to someone who is kosher or to sneak peanuts to someone with a peanut allergy. None of those things is ever acceptable. In some cases it could kill the person. It doesn't matter why a person doesn't eat a thing, if they don't eat a thing, it is incredibly rude to attempt to sneak the food into their diet. I respect my spouse and therefore I will never be so rude to him as to attempt to sneak food that he doesn't eat into his meals. It's just rude.
If your ex-spouse knew about your not eating grated strong cheese, sneaking it into your food without your knowledge is rude. Whatever type of cheese it is that you don't eat, it really doesn't matter. What does matter is that your ex-spouse was rude and disrespectful to you.