Beef in Lemon Mustard Sauce

Are you in a dinner recipe rut? I have a great solution. This quick and easy Beef in Lemon Mustard Sauce recipe is here to spruce up ho-hum dinner plans. Tender pieces of sirloin are braised in olive oil. Sweet onions are sauteed in the drippings. Add some beef stock, whole-grain Dijon mustard, and freshly squeezed lemon juice, and you have a gorgeous skillet full of flavor with little effort.

However, first let’s talk beef. Use the best quality you can for the best results.  When it comes to weeknight dinners, beef can either behave like a tender dream or chew like an old boot. The secret? Choosing the right cut. For this Beef in Lemon Mustard Sauce recipe, Angus sirloin pieces are the star of the skillet. They cook quickly, stay juicy, and soak up that tangy lemon mustard sauce like they were born for it.

Angus beef is known for its rich flavor and beautiful marbling.

That extra marbling means more tenderness and a beefier taste without needing a marathon cooking session. Sirloin, in particular, hits the sweet spot between affordable and luxurious. So it’s leaner than ribeye but still tender enough for fast sautéing. In other words, it works perfectly for quick and flavorful recipes like Beef in Lemon Mustard Sauce.

The trick is simple. Cut the Angus sirloin into evenly sized bite-sized pieces so everything cooks at the same speed. Then give the beef a quick sear over high heat. Do not overcrowd the pan unless you enjoy steamed sadness instead of caramelized beef. As a result, those golden brown edges create the deep savory flavor that balances beautifully with the bright lemon and sharp mustard sauce.

This Beef in Lemon Mustard Sauce absolutely loves a good carb companion. The sauce is creamy, tangy, and practically waves a tiny flag screaming, “Pour me over something starchy immediately!”

So, here are some perfect sidekick options for this Beef in Lemon Mustard Sauce:

• Buttered Egg Noodles – Possibly the ultimate partner. The noodles soak up every drop of that lemon mustard sauce like delicious little flavor sponges. Comfort food level: elite.
• Creamy Mashed Potatoes – Rich mashed potatoes plus tangy beef sauce equals dinner-table silence except for happy chewing noises.
• Parsley Rice – Simple rice balances the bold flavors beautifully. Add fresh parsley and a squeeze of lemon for extra brightness.
• Roasted Baby Potatoes – Crispy edges and fluffy centers work wonderfully with the tender Angus sirloin pieces. Bonus points if you toss them with garlic and rosemary.
• Spaetzle – Tiny German dumplings that were basically invented for sauces like this. Fancy-looking but secretly cozy.
• Crusty Bread – Not technically a side dish. More of a sauce-delivery system. Nobody should leave a single drop behind.

For vegetables, try:

• roasted asparagus
• green beans with almonds
• buttery peas
• sautéed spinach
• honey-glazed carrots

The fresh vegetables help balance the richness while making the whole meal look impressively grown-up, even if you’re eating it in sweatpants while watching cooking shows.

Print

Beef with Lemon Mustard Sauce

Course Dinner

Cuisine American, European

Keyword beef recipes, Easy recipes, Lemon Beef, Lemon Mustard Beef, lemon mustard sauce, quick recipes

Prep Time 20 minutes

Cook Time 25 minutes

Servings 6

Author Lora Wiley-Lennartz

Ingredients

• 2 lbs beef sirloin
• Kosher salt and freshly ground pepper
• 2 tablespoons olive oil
• 1 Sweet onion
• 1.5 cups beef stock
• 3 tablespoons whole-grain Dijon mustard
• 3 tablespoons freshly squeezed lemon juice
• 1 tablespoon cornstarch
• 1-2 pinches sugar
• Parsley for garnish

Instructions

1. Cut the sirloin into bite-sized pieces. Season with salt and pepper.
2. Peel and dice the onion.
3. Juice and zest the lemon.
4. Heat the olive oil in a skillet.
5. Add the beef and sear on all sides.
6. Season with salt and pepper.
7. Cook until desired pinkness.
8. Transfer the beef to a serving plate and cover to keep warm.
9. Add the onion. Sauté until transparent.
10. Add the beef stock and bring to a boil.
11. Whisk in the lemon juice, zest, and mustard.
12. Transfer a few tablespoons to a small dish and whisk in the cornstarch.
13. Slowly whisk the mixture back into the skillet.
14. Keep whisking until the sauce thickens.
15. Season with salt, pepper, and sugar.
16. Pour the sauce over the cooked beef.
17. Garnish with parsley and serve.

So, do you like this Beef in Lemon Mustard Sauce? Then also check out some of these other delicious recipes:

CHEESE FONDUE SIRLOIN CASSEROLE

LEMON BASIL BEEF ROULADE

HONEY VINEGAR DUCK BREAST