To make nachos in the oven, start by preheating your oven to 180°C. Arrange your potato nachos on a baking sheet and top them with your desired toppings like Mexican shredded tofu, cheese, and vegetables. Bake for about 10-15 minutes, or until the cheese is melted and bubbly. Finish with fresh toppings like salsa, avocado, or sour cream before serving.