Looking for a hearty yet healthy dish to impress your family or guests? This vegetable casserole with garlic dill sauce is a flavor-packed and nourishing option that brings together roasted vegetables and a rich, tangy herb sauce. Whether you’re vegan, gluten-free, or just looking to increase your plant-based meals, this casserole checks every box.

Not only is it a comfort food classic, but it’s also packed with immune-boosting ingredients like garlic and a medley of colorful veggies. The standout element? That creamy garlic dill sauce—herbaceous, bright, and just the right touch of garlicky goodness. Learn more about the many health benefits of garlic and why it deserves a regular spot in your kitchen.

And if you’re wondering what gives the sauce its unforgettable punch, look no further than dill. This underused herb is not only flavorful but also versatile. Check out this guide to cooking with dill to discover how it can level up other dishes too.

What Makes This Dish Special

Versatile and easy to customize with seasonal vegetables
Plant-based and gluten-free with easy swaps
Perfect for meal prep, holiday gatherings, or weeknight dinners
The garlic dill sauce doubles as a salad dressing or dip!

Health Benefits of Key Ingredients

Vegetables

Broccoli: High in fiber and vitamin C
Zucchini: Low in calories and high in hydration
Carrots: Packed with beta-carotene and antioxidants
Bell Peppers: Rich in vitamin A and flavor

Garlic & Dill

Garlic: Known for its antimicrobial and anti-inflammatory effects
Dill: Contains flavonoids and aids digestion
Both herbs contribute to heart health and immune function

Sauce Base

Greek yogurt or cashew cream provides a creamy texture and gut-healthy probiotics
Olive oil delivers healthy fats and adds silkiness

Essential Tools for Preparation

Large mixing bowl
9×13 baking dish
Blender or food processor
Chef’s knife and cutting board
Foil or parchment paper (optional for roasting)

Ingredient List

Here’s what you’ll need for the base and sauce:

Casserole Base

2 cups broccoli florets
1 zucchini, sliced
2 carrots, peeled and chopped
1 bell pepper, diced
1 red onion, sliced
2 tbsp olive oil
Salt & pepper to taste

Garlic Dill Sauce

1 cup Greek yogurt or soaked cashews (for vegan version)
2 garlic cloves
2 tbsp fresh dill (or 1 tbsp dried)
1 tbsp lemon juice
1 tbsp olive oil
Salt and black pepper to taste
Optional: splash of water to thin

Step-by-Step Instructions

1. Preheat and Prep

Preheat oven to 400°F (200°C)
Chop all vegetables uniformly for even cooking

2. Roast the Vegetables

Toss vegetables with olive oil, salt, and pepper
Spread evenly on a baking sheet
Roast for 20–25 minutes, flipping halfway through

3. Make the Garlic Dill Sauce

Blend all sauce ingredients in a blender or food processor
Adjust seasoning and consistency
Chill in fridge for 10 minutes to let flavors meld

4. Assemble the Casserole

Layer roasted veggies in a baking dish
Pour garlic dill sauce over the top
Optional: Add vegan cheese or breadcrumbs for a golden top
Bake at 375°F (190°C) for 15–20 minutes

5. Serve Hot

Let cool for 5 minutes
Garnish with fresh dill or parsley

Creative Variations

Add chickpeas or lentils for protein
Use cauliflower, eggplant, or sweet potatoes
Try a spicy twist with chili flakes or jalapeños
Make it Mediterranean with olives and vegan feta

Serving Suggestions

Serve with a side salad and crusty bread
Great with brown rice, quinoa, or pasta
Ideal for meal prepping—just portion and freeze

Storage & Reheating Tips

Store leftovers in an airtight container
Lasts up to 4 days in the fridge
Freeze for up to 2 months—here’s how to do it right
Reheat in oven or microwave until hot

Common Mistakes to Avoid

Over-roasting vegetables until mushy
Using too much garlic—can overpower the dill
Not thinning the sauce enough for pouring
Forgetting to taste-test sauce before assembly

FAQs

Can I use frozen vegetables in the casserole?
Yes, but roast them slightly longer to reduce excess moisture.

How do I thicken garlic dill sauce naturally?
Use Greek yogurt or cashew cream; both create a rich, thick texture.

Is this dish suitable for meal prep?
Absolutely. Portion it into containers and reheat as needed.

Can I make this vegan or dairy-free?
Yes, swap Greek yogurt with blended cashews or coconut yogurt.

What herbs complement dill and garlic?
Parsley, chives, tarragon, and even mint work well in moderation.

Final Thoughts

This vegetable casserole with garlic dill sauce is more than just a delicious dinner—it’s a wholesome, comforting meal that fits into a wide range of dietary needs. It’s simple enough for a weeknight, yet elegant enough for a dinner party. Once you try it, it’ll become a go-to in your recipe collection.

Give it a try, make it your own, and share it with someone who loves good food as much as you do!