Roast beef, well spiced tea sauce

Fancy a recipe to reunite the family?
Here is our roast beef recipe, with a succulent, well-spiced tea sauce.
* Ps: you will see two sauce recipes, classic version (with flour) and keto version (with xanthan gum).
1- Prepare 2 cups of Earl Gray strong tea.
* (If you have smoked tea, it's exquisite!)
2- Preheat the oven to 450˚F
👉ROAST
3- Mix in a small bowl
1 tablespoonstasty organic steak seasoning
1 vs. powdered mustard soup
2 c. sugar (It's also good without 😉 )
4- Spread the mustard mixture around the roast, and place it on a wire rack in a baking pan.
5- Chop 1 onion finely and sprinkle over the top of the roast with 3 tablespoons butter.
6- Bake for 15 minutes. Continue cooking for 18 to 22 minutes per pound for rare meat.
* The interior temperature of the roast should be around 55˚.
* Remove the onions approximately after 30 minutes of cooking, if they are cooked enough to your taste, so that they do not burn.
6- Remove from the oven, place the roast in aluminum foil and cover, then let stand for 10 minutes.
👉SAUCE (CLASSIC VERSION)
7- Cook the onion in 1/4 cup of butter. Add 3 c. flour mix until it forms a paste. Gradually add the tea, stirring with a whisk.
8- Bring to a boil and boil until the sauce has thickened.
9- Add 2 c. concentrated beef broth thus 1/2 tsp (more or less, to taste 😉) of aLes Savoureux organic steak seasoning
9- Cut the roast into thin slices and bury in good sauce!
👉SAUCE (KETO VERSION)
7- Cook the onion in 1 / 4 of butter cup. Add 2 cups of tea. Bring to a boil. Add very quietly 1/4 tsp xanthan gum and whisk until the sauce thickens. Add a little more gum if needed.
9- Cut the roast into thin slices and bury in good sauce!