Half your avocados, remove the stone then slice each half into thirds. Carefully remove the peel.
Set up 4 stations: 1st with your Flour, Garlic Powder and 1/4 tsp salt, second with your Egg and Milk, third with your Breadcrumbs, Parmesan, Smoked Paprika, Cayenne Pepper and 1/4 tsp Salt, 4th with a suitably sized oven tray.
Dunk the avocado first into the flour, then into the egg, (I find this easiest with a fork to save your fingers getting gloopy) and finally into the breadcrumbs. Although tedious, make sure you completely cover the avocado at each stage, especially the breadcrumbs. Place on your oven tray and give them all a good spray of oil.
Bake in the oven at 200C/390F for 10mins, then take out and flip (give an extra spray if needed) and pop back in for another 8-10mins or until golden brown. Timings will vary and these go from golden to burnt pretty quick, so be really vigilant.
Allow to cool for a couple mins, give an extra sprinkle of salt if needed then serve with your favourite dip!