1 tsp. kosher salt
1 package gluten-free focaccia stuffing
3. Drain the soaked wild mushrooms, reserving the soaking liquid. Strain the liquid through a fine-mesh sieve.
4. In the same pan over medium-high heat, warm the remaining 1 Tbs. olive oil. Add the cremini mushrooms and the remaining 1/2 tsp. salt and cook, stirring occasionally, until lightly browned, about 8 minutes. Add the wild mushrooms and garlic and cook, stirring occasionally, for 1 minute. Transfer to the bowl with the leek mixture, add the stuffing and stir until well combined. Stir in the mushroom soaking liquid. Then stir in the stock 1/2 cup (4 fl. oz./125 ml) at a time, making sure it is completely absorbed into the croutons and does not pool in the bottom of the bowl. Taste a crouton; it should be moist throughout but not crunchy or mushy. You may not need all of the stock.
5. Transfer the stuffing to the prepared baking dish. Cover with a lid or a buttered sheet of aluminum foil and bake for 20 minutes. Remove the lid or foil and continue baking until the top is golden brown and crisp, 25 to 35 minutes more. Let rest for 10 minutes before serving. Serves 10 to 12.