Preheat the oven to 400°F (204°C).
Prepare a baking sheet with parchment paper or a silicone baking mat. Set aside.
Bring to boil water in a steamer pot or regular medium saucepan or pot. Add a steamer basket on top with the cauliflower florets. Cover and steam the florets until they are soft when pierce them with a fork (4-7 min).
Stir together the ground flaxseed meal with the water to make the flax egg in a small bowl. Let sit in the fridge for 10 minutes to thicken.
In the meantime, grate the zucchinis and carrots, using the smallest-sized holes on the box grater; set aside.
Add the steamed cauliflowers to a food processor and pulse until they are chopped. You’ll have to work in batches based on the size of the processor work bowl. Let it cool a little.
Prepare a large bowl covered with a kitchen towel or cheesecloth. Add the grated zucchinis and carrots, the steamed cauliflowers, and use the towel to squeeze out as much liquid as you can*.
Transfer the veggies to a large bowl, add the flaxseed egg, nutritional yeast, oats, and garlic salt. Stir well to incorporate all ingredients. Let it sit in the fridge for 10 minutes.
Form even-sized tots using a tbsp of mixture and place them on the prepared baking sheet.
Bake for about 30 to 40 minutes, flipping them halfway through.
Serve with ketchup or your favorite dipping sauce.