To prepare a sausage stuffed mushrooms II recipe, you will first need to prepare the sausage. You will need: 1 pound sausage, 2 tablespoons kosher salt, 1 teaspoon ground black pepper, 1/2 teaspoon thyme, and 1 tablespoon melted butter. Heat the olive oil over medium-high heat. Add the ground sausage to the oil and cook, stirring frequently, until browned on all sides, about 5 minutes. Remove from the heat and set aside to cool. Using tongs, carefully remove the stems from each mushroom. Cut the mushrooms in half lengthwise and scoop out the insides. Place the mushroom halves into the cooled sausage mixture. Cover the mixture with plastic wrap and refrigerate until firm, at least 1 hour.