Heat oil to medium heat.
Slice zucchini into several circles. Add 10-15 slices of zucchini into a bowl of milk to coat.
Add dipped slices to a bowl filled with flour and coat.
Put slices back into the milk and make sure they get all wet again.
Add slices to a bowl filled with Panko crumbs and coat.
Fry in a single layer until golden brown, turning to ensure equal browning on both sides. Repeat the process until all the slices are breaded and fried.