Melt your butter and mix thoroughly with the flour to make a thick pasty roux. Set aside until gravy pan was deglazed.
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Recipe
Rouladen is a classic German dish that tantalizes the taste buds with its rich flavors and tender texture. Thinly sliced beef is rolled around a savory filling of mustard, bacon, onions, and pickles, then braised to perfection in a robust gravy, creating a hearty and satisfying meal typically enjoyed with mashed potatoes or red cabbage.