Per serving
By the Canadian Living Test Kitchen - posted here for safe keeping.
In saucepan, melt butter over medium heat; cook onion, garlic, thyme, salt and pepper, stirring occasionally, until softened, about 5 minutes.
Add mushrooms and potato; cook over medium-high heat until no liquid remains and mushrooms are tender, about 10 minutes.
Stir in flour; cook for 1 minute. Stir in stock and bring to boil; reduce heat and simmer until thickened, about 10 minutes.
Top each serving with dollop of sour cream and sprinkle of green onion.
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