Roasted Broccolini with Creamy Mustard Sauce

Crispy roasted broccolini with creamy mustard sauce. Easy 15-minute side dish for chicken, steak, or pork chops. Dairy-free.

By
Tess Masters
Tess Masters
Tess Masters
Tess is the author of The Blender Girl, The Blender Girl Smoothies, and The Perfect Blend. She has been featured in numerous publications.
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Updated May 23, 2022
Tess Masters
Roasted Broccolini with Creamy Mustard Sauce
Trent Lanz

This simple veggie side dish is a staple in our house because it’s really quick to throw together and super tasty.

When you roast slender stems of broccolini, they become tender, slightly crispy, and even a touch sweet!

Roasted Broccolini with Creamy Mustard Sauce
Trent Lanz

Broccolini is a cross between regular broccoli and gai-lan, a Chinese green that is also in the brassica family. It's loaded with vitamins and minerals, and great for rounding out a healthy meal.

The creamy mustard dressing makes the dish feel special. It's also a fabulous dipping sauce for any other vegetables that take your fancy.

Roasted Broccolini with Creamy Mustard Sauce

Prep Time 5 mins
Cook Time 15 mins
Total Time 20 mins
Servings 4 to 6 servings

Look for broccolini near the broccoli and other leafy green vegetables in the produce section of your grocery store. Substitute regular broccoli if you can't find broccolini.

You will likely have leftover sauce. Store for up to a week and serve over any other roasted vegetables, or use as a dipping sauce.

Ingredients

For the sauce (makes 1 1/4 cups):

  • 1 cup raw unsalted cashews

  • 1/2 cup water

  • 1/4 cup fresh lemon juice

  • 2 tablespoons extra virgin olive oil

  • 2 tablespoons Dijon mustard

  • 1 teaspoon apple cider vinegar

  • 1/2 teaspoon onion powder

  • 1/2 teaspoon garlic powder

  • 1/2 teaspoon fine sea salt (or regular salt)

  • 1/8 teaspoon red pepper flakes

For the broccolini:

  • 1 pound (460g) broccolini

  • 3 1/2 tablespoons extra virgin olive oil

  • 1/2 teaspoon salt, plus more to taste

  • 1/8 teaspoon freshly ground black pepper, plus more to taste

  • 2 tablespoons fresh garlic, finely chopped

  • 1/2 cup sliced raw almonds

  • 1 1/2 tablespoons fresh lemon juice

  • 1/2 teaspoon finely grated lemon zest, plus more to taste

Method

  1. Soak the cashews for the sauce:

    Soak the cashews for 2 hours in a bowl covered with filtered water, then drain. Alternatively, quick-soak the cashews by covering them with boiled water and soaking for 10 minutes, then draining.

  2. Preheat the oven:

    Preheat the oven to 425°F and line a baking sheet with parchment paper.

  3. Roast the broccolini:

    Toss the broccolini with 2 tablespoons of the olive oil, 1/4 teaspoon of the salt, and the pepper. Roast for 10 to 15 minutes or until tender and slightly crispy.

  4. Make the dressing:

    Throw the soaked and drained cashews, water, lemon juice, olive oil, mustard, vinegar, onion powder, garlic powder, salt, and red pepper flakes into your blender. Blast on high for 30 to 60 seconds until smooth and creamy.

  5. Prepare the garlic and almonds:

    In a small pan over medium-low heat, warm the remaining 1 1/2 tablespoons of olive oil and cook the garlic for 1 to 2 minutes until fragrant and just starting to brown.

    Add the almonds, and stir for about 1 minute, or until just warmed. Stir in the lemon juice and zest. Remove the pan from heat.

  6. Top the broccolini and serve:

    Remove the roasted broccolini from the oven and transfer to a platter. Sprinkle the almond mixture over the top of the broccolini, and season with additional lemon juice, zest, salt, and pepper to taste.

    Drizzle with a small amount of the sauce, and pass the remaining sauce at the table. Serve warm.

Roasted Broccolini with Creamy Mustard Sauce
Trent Lanz
Nutrition Facts (per serving)
329 Calories
28g Fat
17g Carbs
7g Protein
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Nutrition Facts
Servings: 4 to 6
Amount per serving
Calories 329
% Daily Value*
Total Fat 28g 36%
Saturated Fat 4g 21%
Cholesterol 0mg 0%
Sodium 515mg 22%
Total Carbohydrate 17g 6%
Dietary Fiber 5g 16%
Total Sugars 3g
Protein 7g
Vitamin C 46mg 231%
Calcium 94mg 7%
Iron 2mg 14%
Potassium 453mg 10%
*The % Daily Value (DV) tells you how much a nutrient in a food serving contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.
Nutrition information is calculated using an ingredient database and should be considered an estimate. In cases where multiple ingredient alternatives are given, the first listed is calculated for nutrition. Garnishes and optional ingredients are not included.