Mince the onion and microwave for 1 minute at 600W. Drain and let cool. Slice the mushrooms thinly.

Mix breadcrumbs and milk in a bowl. Add ground meat, onion, salt, and pepper. Mix until sticky. Divide into two portions and shape into oval patties.

Heat vegetable oil in a pan over medium heat. Cook the patties until browned on one side, flip, cover, and cook on low heat for 7-8 minutes until fully cooked. Remove from pan.

In the same pan, melt butter over medium heat. Add mushrooms and sauté on low heat until softened.

Add flour and cook until no longer raw. Gradually add milk and heavy cream, stirring occasionally. Add consomme and salt, and cook until thickened.