Equipment
Ingredients
Eggplant and Seasoning
- 1 globe eggplant, sliced into 1 cm rounds
- 4 g fine sea salt
- 1 g black pepper, freshly ground
- 45 ml extra-virgin olive oil
Sandwich Assembly
- 8 country bread, sliced 1.5 cm thick
- 100 g black olive tapenade
- 160 g gruyère cheese, shredded
- 25 g unsalted butter, softened at room temperature
Nutrition (per serving)
Nutrition is estimated per serving. Nutrients without complete source data are omitted.
Full nutrition
- Calories
- 648 kcal
- Protein
- 26 g
- Carbohydrates
- 76 g
- Fat
- 36 g
- Sugar
- 8 g
- Saturated Fat
- 13 g
- Zinc
- 1.7 mg
Sources: Aggregated Public Data, USDA FoodData Central
Method
Place the globe eggplant on the cutting board, slice off the stem and calyx, and cut the flesh crosswise into uniform 1 cm rounds using the chef knife.
Arrange the eggplant slices in a single layer across the baking sheet lined with paper towels and sprinkle evenly with 3 g of the fine sea salt.
Let the salted eggplant slices rest undisturbed at room temperature for 15 minutes to purge excess bitter liquid and collapse air pockets.
Press clean paper towels firmly against both sides of the eggplant slices to blot away liquid and surface salt, then season with the remaining 1 g salt and 1 g black pepper.
Place the 12-inch cast-iron skillet over medium-high heat at 190°C (375°F) and heat 25 ml of the extra-virgin olive oil until shimmering.
Add half the eggplant slices to the hot skillet in a single uncrowded layer and pan-fry for 4 minutes per side, turning with the spatula until both sides are deeply golden.
Transfer the fried eggplant to a plate, pour the remaining 20 ml of extra-virgin olive oil into the skillet, and fry the second batch of eggplant slices for 8 minutes total.
Lay four slices of country bread on the cutting board and spread 25 g of black olive tapenade evenly over each slice using the butter knife.
Arrange the warm pan-fried eggplant slices over the tapenade layer in a slightly overlapping row on all four bread slices.
Distribute 40 g of shredded Gruyère cheese over the eggplant on each sandwich and place the remaining four country bread slices on top.
Spread the 25 g of softened butter evenly over the exterior top and bottom faces of all four assembled sandwiches using the butter knife.
Wipe the 12-inch cast-iron skillet clean with paper towels and place it over medium-low heat at 170°C (338°F).
Place two sandwiches into the skillet and toast over medium-low heat for 4 minutes until the bottom bread turns crisp and toasted.
Flip both sandwiches using the spatula, cover the skillet with the skillet lid to retain heat, toast for 4 minutes until the cheese is completely melted, and repeat with the remaining two sandwiches.
Transfer the toasted sandwiches to the cutting board, cut diagonally in half using the chef knife, and serve warm.
Chef's Notes
- Salting the eggplant draws moisture out through osmosis and collapses internal porous structures, preventing the slices from soaking up an excessive amount of oil during frying.
- Pain de Campagne provides an ideal open crumb and hearty crust that supports juicy eggplant and tapenade without turning soggy or tearing during grilling.
- Black olive tapenade brings brisk acidity and herbal salinity that cuts through the dense, buttery nuttiness of warm Gruyère cheese.
- Covering the skillet with a lid during the second side of toasting turns the pan into a mini oven, melting alpine cheeses evenly without burning the outer bread crust.
Storage
Refrigerator: 3 days — Cool cooked components within two hours and store refrigerated in an airtight container at or below 4°C (40°F). For best texture, store fried eggplant separately from sliced bread and tapenade.
Reheating: Reheat assembled sandwiches in a dry skillet over medium-low heat or in an oven preheated to 175°C (350°F) until the center reaches a safe internal temperature of 74°C (165°F) and the crust crisps.
Troubleshooting
Eggplant turns greasy and soft instead of browning
Cause: The skillet and olive oil were not hot enough, or the pan was overcrowded, cooling the fat
Fix: Transfer soggy eggplant to a parchment-lined baking sheet and roast at 200°C (400°F) for 6 minutes to drive off surface oil and crisp the edges
Prevention: Ensure the oil shimmers at 190°C (375°F) before adding eggplant and cook in batches with space between slices
Bread crust scorches before the Gruyère cheese melts
Cause: Skillet temperature was set too high during final toasting
Fix: Remove the sandwich from the skillet and finish warming in an oven at 160°C (320°F) for 5 minutes to melt cheese without adding more color to the crust
Prevention: Keep the skillet at medium-low heat around 170°C (338°F) and keep the lid on to trap radiant heat and steam
Cultural Context
Rooted in the regional cooking of Provence and the wider French countryside, this sandwich celebrates the pairing of Mediterranean sun-ripened aubergine and olive tapenade with rustic country sourdough. In southern France, pain de campagne has long served as a durable foundation for garden harvests and pantry provisions. Melting alpine Gruyère over the assembled vegetables bridges the southern olive tradition with the rich comfort of classic bistro griddled sandwiches.
