1 1/4 cups low sodium chicken broth
1 1/2 tsp. flour
1 large shallot, minced
8 oz. cremini mushrooms, sliced
2 tbsp. extra-virgin olive oil, divided
1/8 tsp. freshly ground black pepper
1 tsp. kosher salt, divided
2 tbsp. fresh parsley, chopped
1 large egg, beaten
1/4 cup grated pecorino cheese, plus extra for serving
1 pound ground white meat chicken
1/2 cup marsala wine, divided
2 tbsp. milk, at room temperature
1/4 cup panko bread crumbs