June 20, 2026 · Recipe

Seared Sirloin Steak with Dijon Tomato Salad and Marble Potatoes

Dinner

This seared sirloin steak recipe is anything but ordinary. Juicy, perfectly cooked steak is served alongside a bright and tangy tomato salad with red onion in a Dijon vinaigrette. The elegant marble potatoes add a beautiful touch to the plate, making this meal as pretty as it is delicious.

Whether you’re cooking for a special occasion or just want to elevate your weeknight dinner, this dish comes together quickly with simple ingredients. The combination of savory steak, zesty salad and buttery potatoes is sure to impress.


Recipe details

Dinner4 servings

Nutrition per serving

Dietary labels

Gluten-free: unknownLactose-free: unknownDairy-free: unknown

Allergen check

Gluten / wheat: unknownMilk / dairy: unknownEgg: unknownFish: unknownShellfish: unknownPeanut: unknownTree nuts: unknownSoy: unknownSesame: unknownMustard: unknownCelery: unknownSulphites: unknownLupin: unknownMolluscs: unknown

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.


Ingredients

Sirloin Steaksirloin steakView ingredient guide
marble potatoesmarble potatoesView ingredient guide
tomatoestomatoes, dicedView ingredient guide
Red Onionred onion, thinly slicedView ingredient guide
Dijon MustardDijon mustardView ingredient guide
Red Wine Vinegarred wine vinegarView ingredient guide
Olive Oilolive oilView ingredient guide
SaltsaltView ingredient guide
Black Pepperblack pepperView ingredient guide

Instructions

  1. Place marble potatoes in a pot and cover with salted water. Bring to a boil and cook until tender, about 15-20 minutes. Drain and set aside.
  2. While potatoes cook, season sirloin steaks generously with salt and pepper on both sides.
  3. Heat 1 tablespoon olive oil in a large skillet over medium-high heat. Add steaks and sear for 4-5 minutes per side for medium-rare or until desired doneness. Remove from skillet and let rest.
  4. In a small bowl, whisk together Dijon mustard, red wine vinegar and remaining 2 tablespoons olive oil to make the vinaigrette. Season with salt and pepper.
  5. In a separate bowl, combine diced tomatoes and sliced red onion. Pour vinaigrette over and toss to coat.
  6. Slice rested steak against the grain. Serve steak with tomato salad and marble potatoes.
  7. Optional: garnish with fresh herbs like parsley or chives.

Recipe Tips

For best results, let steak come to room temperature before cooking.

Marble potatoes are small and cook quickly; check for doneness with a fork.

Let steak rest at least 5 minutes before slicing to keep juices inside.

FAQ

Can I use a different cut of steak?

Yes, you can substitute with ribeye, strip steak or filet mignon. Adjust cooking time accordingly.

Can I make the tomato salad ahead of time?

Yes, you can prepare the salad up to an hour in advance. Keep it refrigerated and dress just before serving to keep tomatoes fresh.

What can I use instead of marble potatoes?

Small new potatoes or fingerling potatoes work well. Cut larger potatoes into bite-sized pieces.

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