Vegan Garden Zucchini Casserole
Time
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Prep: 15 minutes
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Bake: 40–45 minutes
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Total: ~1 hour
Servings
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4–6 servings
Ingredients
Vegetables
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3 medium zucchini, thinly sliced
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1 cup cherry tomatoes, halved
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1 small onion, thinly sliced
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1 red bell pepper, diced
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2 cloves garlic, minced
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1 cup fresh spinach (optional)
Creamy Herb Sauce
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¾ cup unsweetened plant milk (oat or soy)
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½ cup raw cashews (see substitutes below)
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2 tbsp nutritional yeast
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1 tbsp lemon juice or apple cider vinegar
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1 tsp Dijon mustard
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¾ tsp salt
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½ tsp black pepper
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½ tsp dried basil
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½ tsp dried oregano
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¼ tsp thyme or rosemary (optional)
Topping
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½ cup breadcrumbs or crushed crackers
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2 tbsp nutritional yeast
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1 tbsp olive oil (optional)
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2 tbsp chopped fresh herbs (parsley or basil)
Instructions
1. Preheat & Prep
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Preheat oven to 375°F / 190°C
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Lightly grease a medium baking dish (8×8 or similar)
2. Lightly Cook Veggies (Important!)
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Heat a skillet over medium heat
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Add a splash of oil or water
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Sauté onion and bell pepper 3–4 minutes
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Add garlic and zucchini
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Cook 5 minutes, just until softened
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Stir in spinach until wilted
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Remove from heat
(This step prevents watery casserole—worth it!)
3. Make the Creamy Sauce
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Soak cashews in hot water 10 minutes, then drain
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Blend with:
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Plant milk
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Nutritional yeast
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Lemon juice
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Dijon
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Salt, pepper, basil, oregano, thyme
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Blend until smooth and pourable
Cashew Substitutes
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¾ cup silken tofu
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½ cup vegan cream cheese
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½ cup canned coconut milk + ¼ cup plant milk
4. Assemble
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Spread vegetables evenly in baking dish
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Pour sauce over top
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Add cherry tomatoes
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Gently toss to coat
5. Add Topping
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Mix breadcrumbs, nutritional yeast, olive oil, and herbs
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Sprinkle evenly over casserole
6. Bake
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Bake uncovered 40–45 minutes
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Top should be golden and center bubbly
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If browning too fast, tent loosely with foil
7. Rest & Serve
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Let rest 10 minutes before serving
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Garnish with fresh herbs or a squeeze of lemon
Variations
Protein Boost
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Add 1 cup chickpeas or white beans
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Mix in baked tofu cubes
Cheesy Version
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Add ½ cup vegan shredded mozzarella to sauce
Gluten-Free
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Use gluten-free breadcrumbs or crushed rice crackers
Low-Carb
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Skip breadcrumbs, top with hemp seeds or almonds
Spicy Garden Bake
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Add chili flakes or diced jalapeño
Storage & Reheating
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Fridge: 4 days
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Reheats well in oven or microwave
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Freezes okay, but zucchini softens more