---
title: Seared Sirloin Steak and Shallot Demi-Glace
source:
  name: HelloFresh
  url: https://www.hellofresh.com/recipes/seared-sirloin-steak-and-shallot-demi-glace-5bf30285ae08b54dc1391c92
servings: 2
prep time: 15 minutes
cook time: 35 minutes
time required: 50 minutes
difficulty: Easy
allergens:
  - Milk
tags:
  - High Protein
  - Comfort Food
  - Date Night
  - Easy
rating: 4.5
rating_count: 1200
source_chef: Michelle Doll Olson
review_highlights:
  - theme: Suggestions
    text: Check lettuce quality before serving, as some found issues with the greens.
image: "https://images.recipes.furrysalamander.com/Beef%20Recipes/Sirloin%20Steak/seared-sirloin-steak-and-shallot-demi-glace.avif"
---
Wash and dry all produce. Halve, peel, and thinly slice @yellow onion{1%medium}. Halve, peel, and thinly slice half the @shallot{2%unit}. Mince a few shallot slices until you have 3 TBSP minced shallot. Dice @yukon gold potatoes{1.5%lb} into ½-inch pieces. Halve @lemon{1%unit}. Place @dried cranberries{¼%cup} in a #medium bowl{} with enough hot water to cover by 1 inch.

Heat a large drizzle of @vegetable oil{1%tbsp} in a #medium pan{} over medium-high heat. Add onion and sliced shallot and cook, stirring, until browned and softened, ~{15%minutes}. If pan seems dry, add a splash of water. Turn off heat; transfer to another #medium bowl{}. Season with @salt{} and @black pepper{}. Rinse and wipe out pan.

Place potatoes in a #medium pot{} with enough salted water to cover by 1 inch. Bring to a boil and cook until potatoes are tender, ~{15%minutes}. Drain and return to pot; mash with a potato masher or fork until smooth. Stir in @sour cream{2%tbsp}, 1 TBSP @butter{2%tbsp}, salt, and pepper. Keep covered until ready to serve.

Pat @sirloin steak{10%oz} dry with a paper towel, then season all over with salt and pepper. Heat a drizzle of @olive oil{2%tbsp} in same pan used to caramelize onion and shallot over medium-high heat. Add steak and cook to desired doneness, 4-8 minutes per side. Turn off heat. Remove steak from pan and set aside to rest ~{5%minutes}. Rinse and wipe out pan.

Heat 1 TBSP butter in same pan over low heat until melted. Add minced shallot and cook until softened, ~{1%minute}. Stir in @beef demi-glace{1%cup} and ¼ cup water. Simmer until slightly thickened, ~{1%minute}. Turn off heat. Stir in 1 TBSP butter and any resting juices from steak. Season with salt and pepper.

In a large bowl, toss together @mixed greens{5%oz}, cranberries (draining before adding), juice from half the lemon, and a drizzle of olive oil. Season with salt, pepper, and more lemon juice, if desired. Stir caramelized onion and shallot into potatoes. Divide salad, potatoes, and steak among plates. Top steak with sauce.