I am getting stressed out as I had a frozen margarita pizza for lunch today, and it wasn't till I bit into it that I realised the middle was cold. I spat it back out and put it back in for 5 more minutes. Then again bit a bit off and still quite cool, but this time I just ate that but. I put it back in again and was fine the 3rd time but have just scared myself. Worried I might get listeria. It had mozzarella, cheddar and Monterey jack. I feel so silly for chewing that bite.