Mashed potato burgers

[UCM]

Sorry to be greedy but I need more advice. I have some cold mashed potato and want to mix it up with peas & sweetcorn cover in breadcrumbs to make burgers. Do I mix egg in the whole mixture or dip the burgers in egg then roll in breadcrumbs. Do I need an egg at all and do the frozen peas need to be cooked first????????????

Cook the peas, make the burgers (if they don't stick together you can add a little egg then) then egg and then breadcrumb.

Thank you