Heat oven to 400¯F/200°C degrees.
In a large mixing bowl, toss lard or oil with potatoes, onion and garlic.
Add potato mixture to a large baking pan. Bake for 20-30 minutes or until potatoes are soft (don’t overcook). Remove from heat and let cool for 10 minutes.
Add potato mixture to a food processor and pulse 7-8 times or until diced chunks are the size of small pebbles or chunky. Don’t pulse too long – you don’t want mashed potatoes.
Return mixture to a large mixing bowl. Add Parmesan, arrowroot powder, salt, pepper and paprika. Use a spatula to mix well. Again, don’t mash the mixture.
You have two options here to form the tater tots. You could also hand roll each tot but it takes longer.