Roast beef with sauce

For the roast beef, combine in a bowl the thyme, rosemary, salt, pepper, mustard, and olive oil. over the beef with this mix and cook it in the oven at 230 °C for 20 minutes. Reduce the temperature to 170 °C and continue to cook for 15 minutes.

Remove from the oven and place on a rack with an oven tray below to collect the cooking juices. We will use these later for the sauce.

In a saucepan or skillet, melt the butter until golden brown. Add the flour and stir until well combined. Pour in the cooking juice and toss. If needed, add some meat stock.