Roasted Potato Salad Mustard Dressing

The smell of roasting potatoes always pulls me into the kitchen, no matter what I am doing. I discovered this recipe during a summer barbecue when my friend Sarah brought over a bowl of these golden crispy gems instead of the usual creamy potato salad. One bite and I was hooked on the way the warm potatoes soaked up that tangy mustard dressing while still retaining their crunch.

Last Fourth of July I made three huge batches of this salad because my family kept asking for seconds. The fresh radishes and celery add this perfect crunch that cuts through the richness of the roasted potatoes. My brother who claims to hate potato salad went back for thirds and finally asked what was different about this one.

Ingredients

• Baby potatoes: These little gems hold their shape better than larger potatoes and get wonderfully crispy edges when roasted
• Red onion: Thinly sliced raw onion adds a sharp bite that mellows slightly when tossed with warm potatoes
• Fresh herbs: The combination of chives and parsley brings brightness and color that dried herbs simply cannot match
• Dijon mustard: This is the secret ingredient that gives the dressing its signature tang and helps emulsify the olive oil
• White wine vinegar: Adds acidity that balances the richness of the roasted potatoes and olive oil
• Radishes and celery: These provide refreshing crunch and a peppery bite that makes every bite interesting

Instructions

Roast the potatoes to perfection:

Toss halved baby potatoes with olive oil salt and pepper on a large baking sheet. Roast at 220°C for 30 to 35 minutes turning once halfway through until they are golden brown with crispy edges.

Whisk together the vibrant dressing:

While the potatoes roast combine the remaining olive oil Dijon mustard white wine vinegar lemon juice minced garlic salt and pepper in a small bowl. Whisk until the mixture thickens slightly and becomes emulsified.

Combine everything while warm:

Let the roasted potatoes cool for just 10 minutes then transfer to a large bowl. Add the sliced red onion celery radishes chives and parsley then drizzle with the dressing and toss gently to coat everything evenly.

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This salad has become my go to dish for potlucks because it travels so well and actually tastes better after the flavors have mingled for a bit. I love watching people is surprise when they realize it is not the typical gloppy mayo laden potato salad they were expecting.

Make It Your Own

The beauty of this recipe is how adaptable it is to whatever you have on hand or what you are in the mood for. Sometimes I add diced pickles for extra brine or throw in some capers if I want even more tang.

Serving Suggestions

This potato salad pairs beautifully with grilled chicken fish or burgers but I have also been known to eat a big bowl of it for lunch with a piece of crusty bread. The contrast between the hot roasted elements and cool fresh vegetables makes it feel substantial yet refreshing.

Storage And Meal Prep

This salad keeps well in the refrigerator for up to three days though the texture of the potatoes will soften slightly. I actually think the flavors improve after sitting overnight as the dressing penetrates deeper into the potatoes.

• Store in an airtight container and bring to room temperature before serving
• If making ahead keep the fresh herbs separate and add them just before serving
• The potatoes can be roasted up to two days in advance and reheated before assembling

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Every time I serve this at least one person asks for the recipe and I love seeing their face when I tell them how simple it is to make. Happy roasting.

Recipe FAQs

→ Can I make this potato salad ahead of time?

Absolutely. This dish actually improves after a few hours in the refrigerator as the flavors meld together. Make it up to 24 hours ahead, though it's delicious served warm too.

→ What potatoes work best for roasting?

Baby potatoes or fingerlings are ideal because they hold their shape well and develop lovely crispy skins. Yukon Gold or red potatoes cut into uniform chunks work beautifully as alternatives.

→ Can I serve this warm or cold?

Both ways work wonderfully. The potatoes stay creamy inside when served warm, but chilling makes it refreshing for summer gatherings. The dressing coats everything equally well either way.

→ How do I add protein to make it a complete meal?

Consider mixing in crisp bacon pieces, grilled chicken, or flaked smoked salmon. Hard-boiled eggs, white beans, or chickpeas also transform this into a satisfying main dish.

→ What can I substitute for the mustard?

Try whole grain mustard for texture, or swap in tahini mixed with lemon for a creamy Middle Eastern variation. A spoonful of pesto instead of mustard creates a completely different but equally delicious profile.