Bring a large pan of water to a rolling boil and add 1 teaspoon salt.
Add 1.5 lb whole baby potatoes to the boiling water and cook for 15 minutes, or until a knife easily pierces the potatoes and they are just tender.
Drain the potatoes immediately in a strainer or colander and let them steam-dry for a few minutes until the surface is no longer glistening with water.
Transfer the potatoes to a small roasting dish. Pour 3 tablespoons olive oil over the potatoes and roll or toss the dish so the potatoes are evenly coated.
Sprinkle 1½ tablespoons Cajun seasoning over the oiled potatoes and roll or toss the dish again to coat each potato evenly.
Roast in the preheated oven for 15 minutes, turning the potatoes once halfway through, until the potatoes are slightly crisp and crunchy on the outside.
Notes
You want to use small potatoes that can be cooked whole. You can buy Baby Gold Potatoes, Baby Red Potatoes, Baby Salad potatoes, or Gemstone Potatoes.
I use myhomemade Cajun seasoning, but you can use your favorite store-bought brand.