Yes, you can freeze grilled halloumi. When freezing grilled halloumi, it is important to store it properly. You should wrap the cheese well in aluminium foil or cling film before placing it in an airtight container or freezer bag. To ensure that the cheese doesn’t dry out during the freezing process, it’s also important to make sure that the container or bag is tightly sealed. Grilled halloumi will stay fresh for up to three months when stored in the freezer.