Creamy Vegetable Casserole with Yogurt Mustard Sauce
This Creamy Vegetable Casserole with Yogurt Mustard Sauce is warm, comforting, and packed with fresh vegetables and Mediterranean-inspired flavor. Roasted vegetables are baked in a creamy tangy yogurt mustard sauce and topped with herbs and cheese for a healthy casserole that feels rich without being heavy.It’s perfect for cozy dinners, meal prep, or serving as a hearty vegetarian main dish or side.
Prep Time: 20 minutes
Cook Time: 40 minutes
Total Time: 1 hour
Servings: 6
Ingredients
For the Vegetables
2 zucchini, sliced
1 broccoli head, chopped
1 red bell pepper, diced
1 yellow bell pepper, diced
1 cup mushrooms, sliced
1 small red onion, sliced
2 tablespoons olive oil
1 teaspoon oregano
½ teaspoon paprika
Salt and black pepper, to taste
For the Yogurt Mustard Sauce
1 cup Greek yogurt
2 tablespoons Dijon mustard
2 garlic cloves, minced
Juice of ½ lemon
¼ cup grated parmesan or mozzarella
Salt and pepper, to taste
Optional Toppings
Feta cheese
Fresh parsley
Chili flakes
Breadcrumbs for crunch
Sun-dried tomatoes
Instructions
Step 1: Roast the Vegetables
Preheat oven to 425°F (220°C).
Add vegetables to a baking sheet.
Toss with:
olive oil
oregano
paprika
salt
pepper
Roast for about 20–25 minutes until lightly caramelized.
Step 2: Make the Yogurt Mustard Sauce
In a bowl, whisk together:
Greek yogurt
Dijon mustard
garlic
lemon juice
cheese
salt
pepper
The sauce should be creamy and slightly tangy.
Step 3: Assemble the Casserole
Reduce oven temperature to 375°F (190°C).
Transfer roasted vegetables to a casserole dish.
Pour yogurt mustard sauce over the vegetables and gently mix.
Top with extra cheese or breadcrumbs if desired.
Step 4: Bake
Bake for about 15–20 minutes until:
bubbling
golden on top
heated through
Step 5: Serve
Garnish with:
parsley
feta cheese
chili flakes
Serve warm.
Helpful Tips
Roast First for More Flavor
Roasting caramelizes the vegetables beautifully.
Don’t Overbake
Greek yogurt stays creamier with shorter baking time.
Use Thick Yogurt
Thick Greek yogurt prevents watery sauce.
Add Protein
Chicken or chickpeas make it a full meal.
Easy Variations
Mediterranean Deluxe
Add olives, artichokes, and feta.
Extra Protein
Add grilled chicken or turkey.
Low-Carb Version
Use cauliflower and spinach.
Vegan Version
Use dairy-free yogurt and cheese.
What to Serve with Vegetable Casserole
Pairs perfectly with:
Warm pita bread
Rice or quinoa
Greek salad
Grilled chicken
Soup
Roasted potatoes
Frequently Asked Questions
Can I make this ahead of time?
Yes. Assemble ahead and bake before serving.
How long do leftovers last?
About 4 days refrigerated.
Can I freeze it?
Yes, though yogurt texture may change slightly.
What vegetables work best?
Zucchini, broccoli, mushrooms, peppers, cauliflower, and spinach work great.
Can I use regular yogurt?
Greek yogurt is best because it’s thicker.
Nutritional Information
Calories: 260
Protein: 13g
Carbohydrates: 16g
Fiber: 4g
Fat: 16g
Saturated Fat: 5g
Cholesterol: 18mg
Sodium: 390mg
Final Thoughts
This Creamy Vegetable Casserole with Yogurt Mustard Sauce is creamy, fresh, and packed with wholesome Mediterranean-inspired flavor. The roasted vegetables and tangy yogurt mustard sauce create a lighter comfort-food dish that still feels rich and satisfying.It’s simple, nourishing, and perfect for healthy everyday meals or family dinners.