Preheat oven to 425 degrees F, and line a baking sheet with parchment paper. Brush 1 tbsp of olive oil all over the parchment paper.
Bring a large pot with water to a boil over high heat, and add salt. Add the potatoes and boil for 10-15 minutes (depending on the size of the potatoes) until fork tender.
1½ lb baby potatoes, 1 tbsp sea salt
Drain the potatoes and transfer to the prepared baking sheet. Use the bottom of a bowl or a glass jar to smash each potato to about 1/4 inch thick. Brush the remaining 1 tbsp of olive oil on top of the potatoes, then sprinkle to taste with salt and pepper.
Roast in the oven for 40-45 minutes, until crisp and browned.
While the potatoes are roasting, combine all ingredients for the herby dressing in a large mixing bowl and whisk to combine. If you prefer, you can blend all the ingredients together to make a bright green dressing instead.
1/2 cup mayo, 1/2 cup Greek yogurt, 1/3 cup parsley, 1/3 cup green onions, 2 tbsp lemon juice, 1 tsp dijon mustard, 2 garlic cloves, 1 tbsp dill, 1/2 tsp sea salt, 1/4 tsp ground black pepper
Add shallots to the dressing.
1 shallot
Once the potatoes are done roasting, cool for 5-10 minutes then add to the bowl with the dressing. Toss to combine and enjoy!