Preheat oven to 400°F. Line a baking sheet with foil or parchment paper and set aside.
Peel the potatoes and cut into desired french fry shape. Add to a bowl and toss with 2 tablespoons oil, a large pinch of salt, pepper, and the granulated garlic and onion until evenly combined. Transfer to the prepared baking sheet and spread out in an even layer. Roast in the oven until golden brown and crispy, about 20 to 25 minutes.
Meanwhile, heat a large skillet or wok over moderate heat. Drizzle in a tablespoon of oil. Add the shrimp and squid and season with a pinch of salt and pepper. Cook, stirring often, until pink and just cooked through, 5 to to 10 minutes. Transfer to a plate and set aside.
Drizzle another tablespoon of oil into the hot pan and crank up the heat to high. Add the red onion, scallions, aji pepper, garlic and ginger and quickly cook until softened and just beginning to brown, about 5 minutes. Stir in the soy sauce and apple cider vinegar.
Add the cooked fries and the cooked shrimp and squid back to the pan and give it all a good toss. Stir in the cilantro and remove from the heat. Serve with cooked white rice and green aji sauce. Enjoy!