Add 1 teaspoon of salt to the oil and whisk or stir to combine.
Line a large baking tray with parchment paper, add the scrubbed whole new potatoes with their skins on, then brush them all over with the oil and salt mixture on both sides. Bake in a preheated oven at 350°F (180°C) for 35–40 minutes, until golden and tender inside.
Meanwhile, finely chop the fresh dill.
Peel the garlic cloves.
Turn the garlic into a simple garlic sauce by crushing it into a paste and mixing it with a little salt and water (and a drizzle of oil if you like), until creamy and pourable.
Once the potatoes are roasted, drizzle or brush them with the garlic sauce and sprinkle generously with the chopped dill, then serve immediately while hot.
Notes
Use potatoes that are similar in size so they roast evenly and are all tender at the same time.
Do not skip scrubbing the skins well; the potatoes are baked with the skin on for extra flavor and texture.
Fine salt mixes more evenly into the oil, helping every potato get properly seasoned.
Adjust the amount of garlic in the sauce to your taste if you prefer a softer or stronger flavor.
Add the fresh dill at the end so its color stays bright and the aroma remains fresh and vibrant.
Serve the potatoes hot for the best texture, but leftovers can be gently reheated in the oven the next day.