5 slices bacon, cut crosswise into 1/2-inch lengths
2 tablespoons butter
1 onion, cut into 1/4-inch dice
Kosher salt
1 clove garlic, smashed and finely chopped
1 1/2 pounds mixed mushrooms, stems removed and sliced (recommended: shiitake, cremini, or oyster)
2 medium Yukon gold potatoes, diced
2 tablespoons all-purpose flour
1/2 cup dry sherry
4 cups chicken or vegetable stock
1/2 cup heavy cream
2 tablespoons finely chopped fresh flat-leaf parsley, for garnish