Poke vent holes in the potatoes. Microwave on high for 13 minutes.
Meanwhile, put olive oil, vegan cheese, garlic, salt, and pepper in a small pot over medium-low heat. Heat until cheese is fully melted and garlic is cooked.
Let potatoes cool slightly. Halve them and scoop the flesh out into the pot. Discard skins.
Mash potatoes and cheese sauce together until fully incorporated.