Preheat your oven to 375°F (190°C).
In a large skillet over medium heat, add the ground turkey or beef and cook until browned, about 5-7 minutes. Drain any excess fat.
Add the chopped onion and minced garlic to the skillet and sauté for 3-4 minutes until the onion is translucent.
Stir in the frozen mixed vegetables, dairy-free cream of mushroom soup, vegetable broth, dried thyme, garlic powder, salt, and pepper. Combine well and cook for another 2-3 minutes until heated through.
Transfer the meat and vegetable mixture to a 9x13 inch baking dish, spreading it evenly.
Top the mixture with the tater tots in a single layer, arranging them neatly.
If using dairy-free shredded cheese, sprinkle it evenly over the tater tots.
Bake in the preheated oven for 30 minutes, or until the tater tots are golden brown and crispy.
Remove from the oven and let it cool for a few minutes before serving.