Mince half of the onion and slice the other half. Slice the mushrooms. Microwave the minced onion for 1 minute at 600W, drain, and let cool.

In a bowl, mix breadcrumbs and milk to moisten.

Add ground meat, minced onion, salt, and pepper to the bowl. Mix until sticky, divide into two portions, and shape into oval patties.

Heat salad oil in a pan over medium heat. Cook the patties for 2 minutes on each side until browned. Push them aside and sauté the sliced onion and mushrooms until softened.