Sliced beef with mushrooms, onions, tomato, Worcestershire sauce and sour cream.
Preheat the oven to 175DegC and place a large baking pan and a medium baking pan in to preheat.
When pan is hot, drizzle olive oil over the base of the larger of the two pans and scatter the beef strips evenly.
Liberally sprinkle pepper over the beef. Drizzle a little olive oil over the beef and return the pan to the oven and cook for around 25 minutes.
In the second, smaller pan, drizzle olive oil and add the sliced onions. Sprinkle with salt and black pepper and a drizzle of olive oil. Place in the oven and cook for around 15 minutes.
Using forks or tongs, toss the beef and return to the oven for further 10 minutes.
Using forks or tongs toss the onions and then add the mushrooms on top. Return to the oven and cook for further 10-15 minutes.
Add the onions & mushrooms to the beef and toss well to mix.
Add Worcestershire sauce, tomato passata and red wine.
Return to oven and reduce heat to around 160DegC. Cook for at least 1 hour.
Check occasionally and stir well. Add more passata if you feel inclined, or a combination of passata, wine & water if mixture becomes too dry.
Just before serving, add sour cream and mix well, ensuring all cream has melted into the sauce.
Serve with either steamed rice, egg noodles/pasta or potato rosti.
This method results in a very tender beef sauce. I've been making it for years on the stove top and it wasn't until I only had an oven to use (during renovations) that I tried making it in the oven. Have never made it stove top since.