Skillet Steak with Mushroom Sauce
The pan drippings combine with mushrooms, broth and grainy mustard to make a thick and delicious sauce. Sprinkle steak with steak seasoning, garlic and 1/4 teaspoon salt. Heat oil in a 12-inch cast-iron skillet over medium-high heat. Add the steak and broccolini. Cook for 4 minutes, turning the broccolini once (do not turn the steak). Place peas around the steak; sprinkle with thyme. Transfer the skillet to oven and bake until the steak is medium-rare (145F), about 8 minutes....