Heat 1 tablespoon canola oil a 10-inch nonstick skillet over medium-high heat. When very hot, add potato pancake mix, and season with salt and pepper. Use a spatula to press into a flat, round shape to make one large potato pancake. Reduce heat to medium, and cook, shaking pan periodically, until pancake is nicely browned, 5 to 7 minutes. Flip pancake, and add remaining tablespoon of oil, drizzling around the edges of pancake. Gently swirl pan to distribute oil. Season again with salt and pepper. Continue cooking until golden brown and crisp on both sides, 5 to 7 minutes more.