Mustard roast beef with aioli

This mustard roast beef features a tangy mustard crust paired with a creamy garlic and chive aioli, creating a delicious main dish perfect for family dinners. The straightforward roasting technique ensures tender and flavorful beef that complements the rich sauce.

23 Feb 2026
Cook time 65 min
Prep time 15 min

Ingredients:

2 garlic cloves
1 cup mayonnaise
1/3 cup sour cream
2 tbsp chives
2 lb beef
2 tbsp mustard
1/3 cup tarragon (estragon)
Mustard roast beef with aioli

Mustard roast beef with aioli is a delicious and savory dish perfect for any family dinner or special occasion. The combination of tender roast beef with a tangy mustard crust, paired with a creamy aioli sauce, creates a balanced and flavorful experience. This recipe is straightforward and can be a great addition to your culinary repertoire.

Instructions:

1. Combine Ingredients:
- In a medium-sized bowl, combine the minced garlic, 1 cup of mayonnaise, 1/3 cup of sour cream, and 2 tablespoons of finely chopped chives.
2. Mix Thoroughly:
- Stir the mixture until all the ingredients are well incorporated. Ensure the aioli is smooth and the garlic and chives are evenly distributed.
3. Refrigerate:
- Cover the bowl with plastic wrap and refrigerate the aioli for at least 30 minutes to allow the flavors to meld.
4. Season the Beef:
- Pat the 2 lb of beef dry with paper towels to ensure a good sear.
- Rub the beef with 2 tablespoons of mustard, ensuring it is evenly coated.
5. Add Tarragon:
- Sprinkle the finely chopped 1/3 cup of tarragon over the beef, pressing gently so it adheres to the mustard-coated beef.
6. Roast the Beef:
- Place the seasoned beef on a roasting rack in a roasting pan.
- Roast in the preheated oven for about 20 minutes per pound for medium-rare, or until the internal temperature reaches your desired level of doneness (e.g., 130°F (54°C) for medium-rare).
- Use a meat thermometer to check the temperature.
7. Rest the Beef:
- Remove the beef from the oven and let it rest on a cutting board for 10-15 minutes. This allows the juices to redistribute throughout the meat.
8. Slice and Serve:
- Slice the beef thinly against the grain and serve with a generous dollop of the prepared aioli on the side.

Serve your mustard roast beef with aioli alongside your favorite sides, such as roasted vegetables or a fresh salad, to enjoy a hearty and satisfying meal. This dish is sure to impress your guests with its rich flavors and easy preparation. Bon appétit!

Mustard roast beef with aioli FAQ:

What is the recommended baking time for the beef?

Roast the beef for about 20 minutes per pound in a preheated oven. For a 2 lb roast, this will be approximately 40 minutes for medium-rare. Use a meat thermometer to ensure the internal temperature reaches your desired doneness.

How can I tell when the roast beef is done?

The best way to check if the roast is done is by using a meat thermometer. For medium-rare, aim for an internal temperature of 130°F (54°C). Allow for an additional few degrees as the beef continues to cook while resting.

How should I store leftover roast beef and aioli?

Store leftover roast beef in an airtight container in the refrigerator for up to 3-4 days. The aioli can also be stored in the fridge for the same duration. Make sure to consume them within this timeframe for best quality and safety.

Can I substitute ingredients in the aioli?

Yes, you can substitute the sour cream with Greek yogurt for a tangier flavor. You could also use fresh herbs like parsley or dill instead of chives for a different taste.

What if my roast beef is too tough after cooking?

If the roast ends up tough, it may have been overcooked or not rested long enough. Always ensure the meat is cooked to the appropriate internal temperature and let it rest for 10-15 minutes before slicing to maintain tenderness.

Tips:

- For best results, use a meat thermometer to ensure your beef is cooked to your desired level of doneness. Medium-rare is typically recommended for roast beef.

- Let the beef rest for at least 10-15 minutes after roasting before slicing. This helps retain the juices and keeps the meat tender.

- Finely chop the garlic and mix it well into the aioli to ensure even distribution of flavor.

- Feel free to adjust the amount of mustard and tarragon based on your taste preference. If you like a stronger mustard flavor, add an extra tablespoon.

- When making the aioli, whisk the ingredients together until smooth and creamy for the best texture.

Nutrition per serving

8 Servings
Calories 480kcal
Protein 36g
Carbohydrates 4.11g
Fiber 0.28g
Sugar 0.45g
Fat 33g

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