Cut potatoes into steak French fries size. Place on foiled baking sheet. Drizzle with olive oil & lightly toss with tongs. Sprinkle salts & pepper over the potatoes. Bake 400 for 40 minutes or until fork tender. In separate bowl mix: sour cream, ranch dressing & milk. Wisk together. On a separate platter smooth out 3/4 of the sour cream sauce. Place hot potatoes on sour cream sauce. Drizzle remaining sour cream sauce on potatoes. Sprinkle toppings. Place under broiler for a few seconds to re-melt cheese.