For the sauce, Just mix everything together! Quantity are approximative, so you will have to wing it 😉
In a pan over medium heat, add oil (1-2 tbsp) then add the garlic and the panko. Cook for 3 minutes while stirring frequently, if you do not it will toast. Transfer in a bowl immediately.
Cut the fish in slices about 1/2″ wide. Season with salt/pepper, dip in the flour, then in the eggs, and finally in the toasted panko. Cook in the oven at 400F for 20 minutes.
Take them out of the oven then carefully turn them over add a bit of salt over them, cook for another 10 minutes.