Similar thing happened to me at a christmas party except it was with cheese (I'm vegan). My best friend was hosting a party and told me that she asked her mom to leave the parmesean on the side of the pasta because of me. Since there was little else I could eat except the cookies and cupcakes I brought and some raw veggies, I took a small portion. I bit into one of the tortellini and couldn't figure out what the filling was. I don't really remember what cheese tastes like because I never liked it and never really ate it. I asked my friend after the bite and she said "oh, actually, I think it's cheese, sorry." I'm a little curious as to why she left the cheese topping off of it for me, but still filled it with cheese.
Oh well, live and learn. At least you didn't eat a lot of sausage balls!