Flemish Vegetable Gratin
A comforting casserole of seasonal root vegetables layered with a creamy Gruyère sauce and baked to golden perfection. This belgian-inspired vegetarian ready in about 100 minutes pairs carrots, parsnips, potatoes for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 420 calories and feeds 6, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.
Ingredients
- 1.5 lbs carrots
- 1.5 lbs parsnips
- 2 lbs potatoes
- 1.5 cups grated Gruyère cheese
- 1 cup heavy cream
- 4 tbsp butter
- 1 large onion
- 2 cloves garlic
Equipment for this recipe
Top-rated tools to make this recipe successfully.
Instructions
- Step 1: Preheat oven to 375°F (190°C). In a large bowl, toss 1.5 lbs carrots, 1.5 lbs parsnips, and 2 lbs potatoes, peeled and cut into 1/2-inch cubes, with 2 tbsp butter. Spread on a baking sheet and roast for 25 minutes until tender.
- Step 2: Meanwhile, melt 2 tbsp butter in a saucepan. Sauté 1 large diced onion and 2 minced garlic cloves for 5 minutes until golden. Stir in 1 cup heavy cream and 1.5 cups grated Gruyère cheese. Cook over low heat for 10 minutes until the sauce thickens and becomes bubbly.
- Step 3: Transfer the roasted vegetables to a gratin dish. Pour the cheese sauce over the top, ensuring even coverage. Bake for 25-30 minutes until the top is golden and the edges are crispy. Let rest 10 minutes before serving.
Frequently asked questions
How long does Flemish Vegetable Gratin take to make?
Total time is about 100 minutes (40 min prep + 60 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.
How do I store leftover Flemish Vegetable Gratin?
Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep carrots from drying out.
Can I substitute ingredients in Flemish Vegetable Gratin?
Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.
How do I scale Flemish Vegetable Gratin for a different number of people?
The recipe is written for 6 servings. Multiply each ingredient by (your serving target / 6). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.
What goes well with Flemish Vegetable Gratin?
Belgian vegetarian like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.
What others are saying
- ★★★★★
Used half the salt and it was still plenty flavorful.
- ★★★★★
Great base recipe! I added a pinch of smoked paprika and it was even better.
- ★★★★☆
Enjoyable meal. Instructions could be a touch more detailed on the timing.
