Mix Ham, Mashed Potatoes, Green Onions, Egg, Dijon Mustard, Dill Weed, Salt, Black Pepper, And 1/4 Cup Panko Bread Crumbs Together In A Bowl Until Thoroughly Combined. If Mixture Is Too Moist To Hold Together, Mix In An Additional 1/4 Cup Of Crumbs. Place Remaining Panko Crumbs Into A Shallow Bowl. Scoop About 1/3 Cup Of The Mixture And Form Into A Ball; Slightly Flatten Into A Patty. Press Both Sides Of Patty Into The Panko Crumbs; Tap Off Any Loose Crumbs. Repeat With Remaining Mixture. Heat Vegetable Oil In A Skillet Over Medium Heat Until Very Hot; Pan-Fry 2 Or 3 Patties At A Time In The Hot Oil Until Golden Brown On Each Side, 3 To 4 Minutes Per Side.