With ultra heat (UHT) pasteurised cow's milk you can make recipes that do not contain rennet such as;
- Mascarpone
- Yoghurt
- Ricotta
- Quark
It is good to use UHT milk in quark and yoghurt because ultra heat-treated milk denatures more proteins than normal milk, which results in better consistency.
Do not try mozzarella - it will not work.