I imagine Juri makes something healthy, something like a garden mushroom or tuna with good veggies such as romaine. She does a lot of aerial attacks so she needs something that isn’t so filling it could harm her movement. She seriously looks like she would prefer expensive condiments on a sammich.
EDIT: That said, I also imagine she would use the tears of school girls she reks in combat as a sort of rinse for the veggies.