take 3 tbsp of clarified butter, reserving the 4th, and heat in sauce pan. add flour and whisk until it has bubbled vigorously for 30-60 seconds. then add boiling beef stock and whisk until smooth. add the tomato paste and whisk until smooth. sauce should be very thick.
in a very large saute pan add the reserved tbsp of clarified butter and the oil and heat until the pan starts to smoke. add the sliced mushrooms and cook for 3-5 minute add white wine to the mushrooms and cook for 1 minute add the mushroom mixture to the sauce and season to taste with salt and pepper.
if you want a stronger flavor add a small amount of beef bullion crystals in small amounts until you get the flavor you like. you can now add other spices you like.