01 -
In a large Dutch oven over medium heat, melt the butter until fully liquefied.
02 -
Add diced onion and sauté until soft and translucent, about 5 minutes.
03 -
Add the peeled garlic cloves and cook for 1 additional minute, stirring constantly.
04 -
Add the cleaned white button mushrooms to the Dutch oven with the aromatics.
05 -
Pour in the Burgundy wine, boiling water, Worcestershire sauce, dried dill, black pepper, and beef bouillon. Stir thoroughly to combine.
06 -
Bring the mixture to a boil, then cover and reduce to a steady simmer for 1 hour and 30 minutes.
07 -
Remove the lid and continue simmering uncovered for another 1 hour and 30 minutes, allowing the sauce to reduce and flavors to concentrate.
08 -
Add kosher salt to taste, stir well, and serve warm.