Wash the potatoes and cut them into even-sized chunks if they’re larger (about 1–2 inches).
Place the potatoes in a large pot and cover with water. If you’re not on a vegetarian or vegan diet, add a chicken bouillon cube for a deeper, savory flavor instead of salting the water.
Bring to a boil, reduce the heat to a simmer, and cook until just fork-tender (about 10–12 minutes). Avoid overcooking, as they’ll roast later.
Drain the boiled potatoes and spread them out on a baking sheet or plate. Allow them to cool completely at room temperature, then refrigerate them for at least 4 hours (or overnight). Cooling converts some of the digestible starches into resistant starches, making them more blood sugar-friendly.
Preheat your oven to 425°F (220°C).
Remove the potatoes from the fridge and toss them in a large bowl with olive oil, garlic powder, smoked paprika, dried rosemary, seasoned salt, and a sprinkle of regular salt and pepper. Mix until evenly coated.
Spread the potatoes out on a baking sheet in a single layer, ensuring they’re not overcrowded. For extra crispiness, use parchment paper or a lightly oiled sheet.
Roast in the preheated oven for 25–30 minutes, flipping halfway through, until golden brown and crispy.
Transfer the roasted potatoes to a serving dish and garnish with chopped fresh parsley or rosemary for a festive touch. Serve hot as a delicious and diabetes-conscious side dish.