Roughly chopp mushroom ,slice shallots and minced garlic,dice potato,pumpkin,set aside
Add oil to sauce pan ,on low heat stir in shallots until light brown ,add diced pumpkin and potato,garlic ,stir until all soft ,dont let it burn ,this is important
Add roughly chopped mushroom ,take a bit time to stir about 3 mins ,will see mushroom juice,keep stir until almost dry,heat off and transfer to mixing bowl ,let it cool a bit as you can use your palm to touch
In mixing bowl ,add parmesan cheese,bread crumbs,egg yolk,marinate sauce,little extra salt and pepper ,chopped spring onion ,use your hand to mix all well
Now i guess you wonder,all is not stick together yet ,use one spoon to smash potato and pumpkin ,mix again, all will become sticky !
Now is ready to form mushroom burgers patties ,you will get 2 large patty...i will grill only 1 and another one i will keep to make mushroom tbone steak in next recipe :)
Grill on medium heat until brown,warm burger bun,add sliced cheese,mushroom bacon,assembled to delicious mushroom burger :) nommm noomm :)