Here is a recipe for a delicious steak with mushroom sauce:

 Ingredients:

*For the Steak:**
– 2 ribeye or sirloin steaks
– Salt and pepper, to taste
– 2 tablespoons olive oil

**For the Mushroom Sauce:**
– 2 tablespoons butter
– 1 tablespoon olive oil
– 1 shallot, finely chopped
– 2 cloves garlic, minced
– 8 ounces mushrooms (such as cremini or button), sliced
– 1 cup heavy cream
– 1/2 cup beef broth
– 1 teaspoon Dijon mustard
– 1 teaspoon Worcestershire sauce
– Salt and pepper, to taste
– Fresh thyme or parsley, for garnish

 Instructions:

1. **Prepare the Steak:**
– Season both sides of the steaks generously with salt and pepper.
– Heat the olive oil in a large skillet over medium-high heat. When the oil is hot, add the steaks.
– Cook the steaks for 3-4 minutes on each side for medium-rare, or until desired doneness. Remove the steaks from the skillet and let them rest on a plate, tented with foil.

2. **Make the Mushroom Sauce:**
– In the same skillet, add the butter and olive oil over medium heat.
– Add the shallot and garlic, and sauté until they are soft and fragrant, about 2-3 minutes.
– Add the sliced mushrooms and cook until they are golden brown and any liquid has evaporated, about 5-7 minutes.
– Stir in the heavy cream, beef broth, Dijon mustard, and Worcestershire sauce. Bring the sauce to a simmer and let it cook until it thickens slightly, about 5 minutes.
– Season the sauce with salt and pepper to taste.

3. **Serve:**
– Place the rested steaks back into the skillet with the mushroom sauce. Spoon some of the sauce over the steaks and let them warm through for a minute.
– Garnish with fresh thyme or parsley and serve immediately with your choice of side dishes, such as mashed potatoes or steamed vegetables.

Enjoy your delicious steak with mushroom sauce!