Melt butter in a large pan over medium heat, then add garlic and onions and fry until soft. Add mushrooms and continue to fry for another 2 minutes, or until they begin to soften.
Step 2
Sprinkle in flour. Add white wine and scrape up any bits. Gradually add milk while stirring.
Step 3
Continue stirring and allow it to simmer for 2 minutes. When ready, add parmesan, dijon mustard, creme fraiche, and seasoning, then stir.
Step 4
Add extra parmesan and fresh parsley when serving. Serve with meal of choice, and enjoy!