Cut the Yukon Gold potatoes into 1-inch cubes—this size is crucial because it allows them to cook through quickly (about 8 minutes) while still holding their shape. While bringing a large pot of salted water to a boil, mince your garlic, finely slice your chives, chop your parsley, and finely mince your shallot. Having everything prepped before the potatoes finish cooking means you can dress them while they're still warm, which helps them absorb the vinaigrette better.

Add the cubed potatoes to the boiling salted water and cook for 8 minutes until they're just tender but still hold their shape when pierced with a fork. You want them cooked through but not falling apart—overcooked potatoes will become mushy and won't hold the vinaigrette well. Drain immediately in a colander and transfer to a large serving bowl while still warm.

In a small bowl, whisk together the Dijon mustard, minced garlic and shallot from Step 1, lemon juice, lemon zest, salt, and pepper. The mustard acts as an emulsifier, helping the oil and lemon juice combine smoothly. Slowly whisk in the extra-virgin olive oil until the vinaigrette is well combined and slightly thickened. I always taste the dressing at this point and add a touch of honey if needed—it rounds out the acidity beautifully without making it noticeably sweet. Pour this warm vinaigrette over the hot potatoes immediately, allowing them to absorb the flavors as they cool.

Add the fresh chives, parsley, and additional minced garlic from Step 1 to the dressed potatoes. Gently toss everything together, being careful not to break up the potatoes. I prefer to add the herbs just before serving so they stay bright and don't lose their vibrant color. Taste and adjust seasoning if needed, then serve at room temperature or slightly warm.