June 13, 2026 · 30 min

Sirloin Steak with Dijon Parsley Butter, Roasted Yukon Potatoes and Garlic Green Beans

Dinner30 min745 cal / serving

This easy sirloin steak dinner keeps the method straightforward: roast cubed Yukon Gold potatoes, sear the steak for color, then finish it in the oven until cooked to your liking.

A quick butter mixed with Dijon mustard and parsley melts over the warm sliced steak, while garlicky green beans add a crisp, savory side.


Recipe details

Dinner30 min745 cal / serving2 servings

Nutrition per serving

Calories745 kcalProtein39.5 gFat43.2 gCarbs46.8 gSugar13 gFiber2.8 gSodium1157 mg

Dietary labels

Gluten-free: yesLactose-free: noDairy-free: no

Allergen check

Gluten / wheat: not detectedMilk / dairy: containsEgg: not detectedFish: not detectedShellfish: not detectedPeanut: not detectedTree nuts: not detectedSoy: not detectedSesame: not detectedMustard: containsCelery: not detectedSulphites: not detectedLupin: not detectedMolluscs: not detected

Values are calculated per serving from ingredient amounts and the ingredient nutrition reference per 100g. Allergen and diet labels use available ingredient metadata and name matching; always check product labels for strict diets or allergies. Some ingredient amounts or nutrition values were incomplete, so this is marked as a partial estimate.


Ingredients

Yukon Gold Potatoes12 ounce Yukon Gold PotatoesView ingredient guide
Garlic2 clove GarlicView ingredient guide
Parsley0.25 ounce ParsleyView ingredient guide
Sirloin Steak12 ounce Sirloin SteakView ingredient guide
Green Beans6 ounce Green BeansView ingredient guide
Dijon Mustard1 teaspoon Dijon MustardView ingredient guide
Vegetable Oil1 tablespoon Vegetable OilView ingredient guide
Butter1 tablespoon ButterView ingredient guide
SaltSalt, to tasteView ingredient guide
PepperPepper, to tasteView ingredient guide

Instructions

  1. Preheat the oven to 425°F. Wash and dry the produce. Set the steak and 1 tablespoon butter out at room temperature while you prep.
  2. Peel the Yukon Gold potatoes and cut them into 1/2-inch cubes. Thinly slice the garlic and finely chop the parsley.
  3. On a baking sheet, toss the potatoes with a drizzle of vegetable oil, salt and pepper. Roast until browned and tender, 20 to 25 minutes total; you will add the steak to the sheet before the potatoes are finished.
  4. While the potatoes roast, heat a drizzle of vegetable oil in a large pan over medium-high heat. Season the steak with salt and pepper. Sear until browned, 2 to 3 minutes per side.
  5. Remove the baking sheet from the oven and toss the potatoes. Place the seared steak on the same sheet, return it to the oven and roast until cooked to your desired doneness, 5 to 7 minutes. Transfer the steak off the sheet and let it rest for 5 minutes.
  6. Meanwhile, heat another drizzle of vegetable oil in the same large pan over medium heat. Add the green beans and cook, tossing, until tender but still slightly crisp, 4 to 5 minutes.
  7. Add the sliced garlic to the green beans and cook until fragrant, about 30 seconds. Season with salt and pepper.
  8. In a small bowl, stir together the softened butter, Dijon mustard and a pinch of chopped parsley. Season the butter mixture with salt and pepper.
  9. Slice the rested steak against the grain. Spoon the Dijon parsley butter over the steak. Serve with the roasted potatoes and garlicky green beans, garnishing with any remaining parsley.

Recipe Tips

Set the butter out early so it softens enough to mix smoothly with the Dijon and parsley.

Letting the steak sit at room temperature briefly before cooking helps it cook more evenly.

Do not add the garlic to the green beans too early; it only needs about 30 seconds to become fragrant.

Rest the steak for 5 minutes before slicing so the juices settle.

Slice the steak against the grain for a more tender bite.

FAQ

How long does this steak dinner take?

Plan on about 30 minutes from start to finish, with the potatoes roasting while the steak and green beans are cooked.

What kind of steak is used?

This recipe uses sirloin steak.

What is in the Dijon parsley butter?

It is made with softened butter, Dijon mustard, chopped parsley, salt and pepper.

How do I keep the green beans crisp-tender?

Cook them over medium heat for 4 to 5 minutes, tossing, then add the garlic at the end for about 30 seconds.

Should I slice the steak before serving?

Yes. Let it rest for 5 minutes, then slice it against the grain and top it with the Dijon parsley butter.

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