Wash and cut the beef and vegetables.

Coat the beef with flour, salt, and pepper.

Heat olive oil in a pan and stir-fry the beef.

Add the buffalo, onions, and carrots to a pressure cooker and fry.

Add the red wine and cook off the alcohol.

Add the tomatoes.

Add bouillon powder and water. Bring to a boil and skim off any foam.

Pressure cook for 25-30 minutes.

Allow the pressure to release naturally for steaming.

Add the mushrooms and simmer for 5-10 minutes.

Add sugar, salt, and pepper. Then stop heating.