Underground Root Vegetable Tart with Caramelized Onions
A rustic tart featuring hidden layers of parsnip, carrot, and celeriac, bound in a nutty sage crust. This french-inspired vegetarian (vegetarian) ready in about 65 minutes layers sheet (14 oz) puff pastry, diced celeriac, diced carrot into a dessert worth slowing down for — great for weekend baking, holiday tables, or any time you want a sweet payoff at the end of a meal. Each serving lands at about 385 calories and feeds 6, so it slots into a weekend bake or a special-occasion dessert tray. 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 sheet (14 oz) puff pastry
- 1 cup diced celeriac
- 1 cup diced carrot
- 1 cup diced parsnip
- 1 large thinly sliced onion
- 2 tbsp chopped sage
- 3 tbsp olive oil
- 1/4 cup heavy cream
- 1/2 tsp salt
Instructions
- Step 1: Preheat oven to 375°F. Roll out puff pastry on a floured surface to fit a 9-inch tart pan; press into pan and trim edges. Prick base with a fork. Bake 15 minutes until golden.
- Step 2: Heat 2 tbsp olive oil in a skillet over medium heat. Cook sliced onions for 20 minutes until deep golden and caramelized, stirring occasionally. Add 1/4 tsp salt and remove from heat.
- Step 3: In same skillet, heat remaining 1 tbsp olive oil over medium-high. Sauté diced celeriac, carrot, and parsnip for 8 minutes until softened. Stir in 1 tbsp chopped sage and cook 1 minute. Spread vegetables over baked pastry, top with caramelized onions, and drizzle with cream. Bake 25 minutes until edges are golden.
Equipment for this recipe
Top-rated tools to make this recipe successfully.
Frequently asked questions
How long does Underground Root Vegetable Tart with Caramelized Onions take to make?
Total time is about 65 minutes (25 min prep + 40 min cook). Most home bakers find this fits a weekend afternoon; chill or store as the recipe directs before serving.
How do I store leftover Underground Root Vegetable Tart with Caramelized Onions?
Cool fully before storing. Most baked desserts keep at room temperature in an airtight container for 2–3 days, or in the fridge for up to 5 days. Cream- or custard-based desserts must go in the fridge within 2 hours; reheat gently or serve cold per the recipe.
Can I substitute ingredients in Underground Root Vegetable Tart with Caramelized Onions?
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 Underground Root Vegetable Tart with Caramelized Onions 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.
Is Underground Root Vegetable Tart with Caramelized Onions vegetarian?
Yes — this recipe is tagged vegetarian based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.
What others are saying
- ★★★★★
Used half the salt and it was still plenty flavorful.
- ★★★★★
Love how the European come through in every bite.
- ★★★★☆
Enjoyable meal. Instructions could be a touch more detailed on the timing.
