Tonight's dinner was brought to you by the game "Rummage in the freezer 'til you find something that won't take too long to thaw, marinate, and cook.. ready? Go!" Aaand we have a winner!
A quick allrecipes.com search led me to this recipe, which I modified a bit (shocker, I know). We served it over brown rice, with roasted garlic-lemon broccoli on the side. Here is my version.
modified from this recipe
1 lb sirloin steak, sliced against the grain into thin strips
1/4 cup Worcestershire sauce (some brands contain HFCS--read the labels!)
1/4 cup balsamic vinegar
2 Tbsp olive oil, plus 1 Tbsp for the pan later
2 Tbsp (two big squirts) prepared yellow mustard
Freshly ground black pepper to taste
1. In a shallow dish, whisk together Worcestershire, balsamic vinegar, 2 Tbsp olive oil, mustard, and pepper. Place steak strips into mixture and marinate at least 30 minutes.
2. Cook rice according to package directions.
3. Heat a medium skillet (cast iron works great!) over medium-high heat and add the remaining 1 Tbsp olive oil. Swirl the pan to coat the bottom. Add marinated steak strips to pan; discard unused marinade. Cook steak 3-5min per side, or to your desired doneness. Serve over hot cooked rice.
Next time I make this, I will double the recipe to make sure we have leftovers for lunches. The beef was very tender and flavorful. The original recipe calls for onion, which I didn't have, but I can see how it would be a tasty addition to this dish, perhaps even with a sliced bell pepper.