Steak Mustard Pan Sauce
Seared sirloin with a tangy Dijon pan sauce, roasted sweet potatoes, and crispy shallots.

main
Servings: 2
Ingredients
- 1sweet potato
- 1shallot
- 1 bunchcurly kale
- 10 ozpkg sirloin steaks
- 2(¼ oz) Dijon mustard
- olive oil
- kosher salt & ground pepper
- white wine vinegar (or apple cider vinegar)
- butter (1 tbsp)
Instructions
- Preheat oven to 450°F with a rack in the center. Scrub sweet potato, then cut into wedges (½-inch thick, lengthwise). Strip kale leaves from stems, then roughly chop leaves, discarding stems. In a medium bowl, toss kale with 2 teaspoons oil and season with salt and pepper.
- On a rimmed baking sheet, toss sweet potato wedges with 1 tablespoon oil and a pinch each of salt and pepper. Arrange in a single layer, cut-side down. Roast until tender and golden, about 20 minutes.
- Meanwhile, heat 3 tablespoons oil in a medium skillet over medium until shimmering. Add shallots and cook, stirring occasionally, until golden, 7–10 minutes (watch closely—shallots will continue to darken once out of the oil). Transfer to a paper towel–lined plate; season with salt. Discard frying oil.
- Heat 1 tablespoon oil in same skillet over medium-high. Pat steaks dry and season all over with salt and pepper. Add steaks and sear undisturbed until browned, 3–4 minutes per side (for medium-rare; longer for desired doneness). Transfer steaks to a cutting board to rest.
- Add ½ cup water and 1 tablespoon each of mustard and vinegar over center of skillet. Bring to a rapid simmer over medium-high; cook, scraping up browned bits, until slightly reduced, about 2 minutes. Add 1 tablespoon butter and any resting juices from the steak and swirl until melted. Season to taste with salt and pepper.
- Meanwhile, scatter kale over sweet potatoes and continue to roast on center oven rack until kale is wilted, about 5 minutes. Serve steaks with roasted sweet potatoes and kale, pan sauce all over. Top with fried shallots. Enjoy!