We haven't tried it yet. We are planning on using it to steam some veggies the next time we have the left over whey/salt water from making our mozzarella. The resulting mozzarella is as good as fresh store bought & surely better than supermarket cheese.
Most cheap mozzarella sold in packages contain extenders to increase the volume and keep the cheese fresh adding to the weight. The ingredients on a package for example: "cheese culture, salt and enzymes, potato starch, corn starch, and calcium sulfate added to prevent caking, natamycin (a natural mold inhibitor)." Yeah, cheese needs potato starch and corn starch, gimme a break. We are being ripped off. How many packages don't list the ingredients and just call it processed mozzarella cheese? Be careful when you buy cheeses if you don't know what is inside the package. It is like buying poultry that is filled with water, frozen and then weighed or cold cuts with paper between the slices in a delicatessen. Very expensive water or paper per pound or Kg.