Equipment
* optional
Ingredients
Salt-Roasted Beetroot and Vegetables
- 350 g beetroot, whole, unpeeled
- 200 g coarse sea salt, dry crystals
- 160 g red bell pepper, whole
- 150 g red onion, whole, unpeeled
- 2 garlic, cloves, unpeeled
- 30 ml extra virgin olive oil
- 3 g fine sea salt
- 1 g black pepper, freshly cracked
Pastry and Assembly
- 320 g all-butter puff pastry, chilled ready-rolled sheet
- 150 g goat cheese, fresh chèvre log, crumbled
- 1 egg, room temperature
- 5 g fresh thyme, fresh sprigs
- 15 ml honey
- 10 ml balsamic vinegar, aged, syrupy
Nutrition (per serving)
Nutrition is estimated per serving. Nutrients without complete source data are omitted.
Full nutrition
- Calories
- 681 kcal
- Protein
- 15 g
- Carbohydrates
- 53 g
- Fat
- 46 g
- Zinc
- 1.0 mg
- Water
- 121 g
Sources: Aggregated Public Data, USDA FoodData Central
Method
Preheat the oven to 200°C (400°F) with racks positioned in the center and lower-third levels.
Spread coarse sea salt onto a wide sheet of aluminum foil, set the washed whole beetroots directly onto the salt bed, and seal the foil tightly into an airtight parcel.
Place the foil-wrapped beetroot parcel onto a baking sheet and roast at 200°C (400°F) for 50 minutes until a small knife tip pierces cleanly to the core.
While the beets roast, cut the red bell pepper into 1 cm wide strips and the red onion into 1 cm thick wedges using a chef knife and cutting board.
Spread the sliced pepper and onion onto a second baking sheet lined with parchment paper, then toss with extra virgin olive oil, minced garlic, fine sea salt, and black pepper.
Slide the baking sheet with peppers and onions into the oven alongside the beetroots and roast at 200°C (400°F) for 20 minutes until tender with lightly browned edges.
Remove both baking sheets from the oven, unwrap the beetroot parcel carefully to let steam escape, and let all roasted vegetables cool at room temperature for 10 minutes.
Grip each warm beetroot using a paper towel and rub the loosened skins off completely, then trim away root tails and stem ends using a chef knife.
Slice the peeled beetroots into uniform 5 mm thick rounds using a chef knife on a cutting board.
Lay the chilled sheet of puff pastry onto a fresh sheet of parchment paper on a baking sheet, then score a 1.5 cm border around the edge with a chef knife, without slicing through the dough.
Dock the entire inner area inside the scored pastry frame repeatedly using a fork to prevent the center from rising unevenly during baking.
Layer the sliced beetroots, roasted peppers, and caramelized onions evenly across the inner pastry rectangle, then crumble the goat cheese evenly over the vegetables.
Beat the egg in a small bowl and brush the wash lightly over the 1.5 cm pastry border using a pastry brush, preventing drips from running down the outer cut edges.
Bake the tart on the lower-third oven rack at 200°C (400°F) for 22 minutes until the pastry border is puffed high, deep golden brown, and the goat cheese is soft and lightly blistered.
Drizzle the tart with honey and aged balsamic vinegar, then scatter fresh thyme leaves across the melted goat cheese and roasted vegetables.
Slice the warm tart into 4 generous rectangular portions using a chef knife on a cutting board and serve immediately.
Chef's Notes
- Salt-roasting encases the beetroots in gentle, indirect dry heat that intensifies natural sweetness without diluting flavor like boiling does.
- Always chill the puff pastry sheet thoroughly before scoring and topping; cold butter layers generate steam pockets that create explosive pastry rise.
- Pre-roasting the peppers and onions removes free water, preventing a waterlogged crust during the final bake.
- Aged, dense balsamic vinegar provides a balanced acid counterpoint to rich goat cheese and naturally sweet roasted vegetables.
Storage
Refrigerator: 3 days — Cool leftovers promptly and store in an airtight container lined with a dry paper towel to absorb moisture.
Freezer: 1 month — Wrap individual baked and cooled slices in parchment paper, then store in an airtight freezer bag or container.
Reheating: Reheat refrigerated or thawed slices on a baking sheet in an oven preheated to 180°C (350°F) for 10 to 12 minutes until pastry crisps and center reaches an internal temperature of 74°C (165°F). Avoid microwaving, which results in soggy pastry.
Troubleshooting
Pastry base is pale, limp, and soggy underneath
Cause: Vegetables retained excess moisture or the tart was baked without sufficient bottom heat
Fix: Slide the tart directly onto a preheated baking sheet on the bottom rack for 4 to 6 minutes to crisp the underside
Prevention: Roast vegetables thoroughly ahead of assembly, ensure they are cooled, and bake the tart on the lowest oven rack
Pastry border failed to puff and remain flat
Cause: Puff pastry became warm and greasy before baking, or egg wash dripped over cut edges sealing pastry layers
Fix: Cannot be fixed once baked; flavor and flakiness remain enjoyable
Prevention: Work quickly with cold puff pastry and brush egg wash strictly on the top face of the border
Cultural Context
Savory vegetable tarts, or tartes salées, are a cornerstone of French bistro cooking, celebrating garden-fresh produce with regional cheeses. The pairing of earthy beetroots and tangy goat cheese (chèvre) originates in the Loire Valley, where goat dairies and root crops share culinary dominance. Using all-butter laminated puff pastry lends a refined, modern presentation to this rustic regional classic.
