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A plate of crispy vegan tater tot casserole with pieces of savory plant-based chicken and green onions, served on a white dish with a fork and knife.

Easy Vegan Tater Tot Casserole Recipe

Vegan Tater Tot Casserole is a cozy, crowd-pleasing dish packed with veggies, plant-based protein, and topped with crispy tater tots. It’s perfect for family dinners or potlucks and can easily be made ahead or frozen for busy days. With simple prep and a big payoff, it’s the kind of meal that makes life a little easier. Plus, it’s so good everyone will be reaching for seconds!
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Prep Time: 10 minutes
Cook Time: 15 minutes
Total Time: 25 minutes
Course: Casserole, Main Course
Cuisine: American
Keyword: Vegan Tater Tot Casserole
Servings: 4
Calories: 499kcal
Author: Mandy Applegate

Equipment

Ingredients

  • 1 cups chopped onion divided
  • 2 large garlic cloves finely chopped
  • 3 tablespoons vegan butter
  • ¼ cup all-purpose flour
  • ¼ cup vegetable broth
  • 1 ¼ cup unsweetened vegan milk
  • 1 tablespoons nutritional yeast
  • 1 cup coarsely chopped mushrooms
  • 1 pound bag frozen mixed vegetables
  • ½ pound seitan chopped
  • 1 pound bag frozen tater tots
  • Crispy onions for garnish
  • Black pepper to taste
US Customary - Metric

Instructions

  • Preheat your oven to 350°F (180°C) and lightly grease a 9" x 13" baking dish. Set it aside while you prepare the filling.
  • In a medium saucepan, melt vegan butter over medium heat. Add the chopped onion and garlic, sautéeing until the onion is soft and fragrant, about 5 minutes. Stir in the flour, creating a thick paste.
    1 cups chopped onion, 2 large garlic cloves, 3 tablespoons vegan butter, ¼ cup all-purpose flour
  • Gradually whisk in the vegetable broth and vegan milk, continuing to stir until the mixture thickens into a smooth sauce. Add nutritional yeast to the sauce, then stir in the chopped mushrooms, frozen mixed vegetables, and seitan. Season with black pepper, ensuring the filling is well mixed and evenly seasoned.
    ¼ cup vegetable broth, 1 ¼ cup unsweetened vegan milk, 1 tablespoons nutritional yeast, 1 cup coarsely chopped mushrooms, 1 pound bag frozen mixed vegetables, ½ pound seitan, Black pepper
  • Pour the prepared filling into the greased baking dish, spreading it out evenly. Arrange the frozen tater tots in a single layer on top of the filling.
    1 pound bag frozen tater tots
  • Bake the casserole uncovered for 15 minutes, remove halfway through, sprinkle the crispy onions, and then cook further until the tater tots are golden and crisp and the filling is heated through. Serve immediately while hot.
    Crispy onions

Notes

  • Thicker Sauce Option: If you like a richer filling, let the sauce cook a bit longer to thicken up even more.
  • Custom Veggie Mix: Don’t feel limited by frozen mixed vegetables; swap them out for your favorites like broccoli, cauliflower, or even sweet corn.
  • Arrange Tater Tots: Lining up your tater tots neatly ensures they cook evenly and makes the dish look extra appealing.
  • Crunchy Top Tip: Add the crispy onions halfway through baking to keep them from browning too much.
  • Protein Swap: Not into seitan? Tofu or tempeh works just as well for a tasty protein boost.
  • Serve Fresh: This casserole is best enjoyed hot out of the oven while the tater tots are at their crispiest.
  • Meal Prep Hero: You can assemble this dish the night before and bake it fresh when you’re ready to serve.

Nutrition

Calories: 499kcal | Carbohydrates: 61g | Protein: 23g | Fat: 20g | Saturated Fat: 4g | Polyunsaturated Fat: 7g | Monounsaturated Fat: 7g | Trans Fat: 0.04g | Sodium: 985mg | Potassium: 829mg | Fiber: 10g | Sugar: 5g | Vitamin A: 6486IU | Vitamin C: 29mg | Calcium: 161mg | Iron: 3mg
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