1 tablespoon butter, divided
Gf Cooking spray
1/3 cup shallots, finely chopped
1/2 pound shiitake mushrooms, stems removed
1-1/2 cups dry wine (cabernet sauvignon), divided
10 ounces Gf
beef brothFreshly cracked black pepper
Four 4 ounce filet mignon steaks (about 1" thick)
1 Tablespoon gf soy sauce
2 teaspoons cornstarch
1 teaspoon dried thyme