This dish is very easy and quick to make. There are few ingredients but a lot of flavor.
Steak with Mustard-Shallot Sauce
1 ½ lb. sirloin steak
2 tsp. olive oil
2 Tbsp. Dijon mustard
2 Tbsp. Red wine vinegar
1 shallot (chopped)
Season 1 ½ lb. sirloin steak (1 inch thick) with salt and black pepper. Cook in 2 tsp. olive oil in a large skillet over medium-high, 3 to 5 minutes per side for medium rare. Let rest 5 minutes, and then slice. Whisk together 2 Tbsp. each Dijon Mustard and red wine vinegar and 1 chopped shallot. Serve with your choice of vegetable.
(From Real Simple Magazine)