Eggplant Caponata Crostini: Easy Italian Appetizer

Eggplant caponata crostini is a classic Sicilian appetizer featuring tender eggplant, tomatoes, olives, and capers simmered in a sweet-and-sour sauce, served on crisp toasted bread. This version balances the traditional agrodolce flavors with a bright, herbaceous finish, making it a crowd-pleasing starter or light lunch. The caponata can be made ahead, and the crostini come together in minutes, so it’s perfect for entertaining.

Ingredients

1 large eggplant (about 1 lb / 450 g), cut into ½-inch (1.25 cm) cubes
3 tbsp (45 ml) olive oil, divided
1 medium onion, finely chopped (about 1 cup / 150 g)
2 celery stalks, diced (about 1 cup / 120 g)
3 cloves garlic, minced
2 cups (300 g) cherry tomatoes, halved, or 1 can (14 oz / 400 g) diced tomatoes, drained
¼ cup (40 g) green olives, pitted and roughly chopped
2 tbsp (20 g) capers, rinsed and drained
2 tbsp (30 ml) red wine vinegar
2 tsp (10 g) sugar
¼ tsp salt, plus more to taste
¼ tsp black pepper
2 tbsp (8 g) fresh basil, chopped, plus more for garnish
1 baguette (about 12 oz / 340 g), sliced into ½-inch (1.25 cm) rounds
2 tbsp (30 ml) olive oil for brushing bread
1 clove garlic, halved (for rubbing toast)

Instructions

Place the eggplant cubes in a colander and toss with 1 teaspoon salt. Let sit for 20 minutes to draw out excess moisture, then pat dry with paper towels.
Heat 2 tablespoons (30 ml) olive oil in a large skillet over medium heat. Add the eggplant and cook, stirring occasionally, until golden and tender, about 8–10 minutes. Transfer to a plate and set aside.
In the same skillet, add the remaining 1 tablespoon (15 ml) olive oil. Add the onion and celery and cook over medium heat until softened, about 5 minutes. Add the garlic and cook for 1 minute more.
Stir in the tomatoes, olives, capers, vinegar, sugar, salt, and pepper. Bring to a simmer and cook until the tomatoes break down and the mixture thickens slightly, about 10 minutes.
Return the eggplant to the skillet and stir to combine. Cook for 5 more minutes to allow the flavors to meld. Remove from heat and stir in the fresh basil. Taste and adjust seasoning if needed.
Preheat the oven to 400°F (200°C). Arrange the baguette slices on a baking sheet and brush both sides lightly with olive oil. Toast for 5–7 minutes, flipping once, until golden and crisp. While still warm, rub each slice with the cut side of the garlic clove.
Spoon the caponata over the toasted crostini and garnish with extra basil. Serve warm or at room temperature.

Tips

Salting the eggplant: This step removes bitterness and helps the eggplant absorb less oil. If you’re short on time, you can skip it, but the texture will be less firm.
Make ahead: The caponata can be made up to 3 days in advance and stored in an airtight container in the refrigerator. Bring it to room temperature or reheat gently before serving.
Substitutions: Use Kalamata olives instead of green, or add a pinch of red pepper flakes for heat. For a gluten-free option, serve the caponata on gluten-free crackers or endive leaves.
Common mistake: Overcooking the caponata can turn it mushy. Keep the eggplant cubes intact by stirring gently and cooking just until tender.

Serving Suggestions

Serve the crostini as an appetizer at a dinner party, or alongside a fresh green salad for a light lunch. They also pair well with grilled fish or chicken. For a casual gathering, set out the caponata in a bowl with the toasted bread on the side so guests can assemble their own.

Variations

Add pine nuts: Toasted pine nuts sprinkled on top add a pleasant crunch and richness.
Use balsamic vinegar: Swap the red wine vinegar for balsamic for a deeper, sweeter flavor.
Add raisins: A handful of golden raisins simmered with the tomatoes adds extra sweetness and texture.
Make it a main: Toss the caponata with cooked pasta or serve it over creamy polenta for a vegetarian main course.

Storage and Reheating

Store leftover caponata in an airtight container in the refrigerator for up to 4 days. The crostini are best eaten fresh, but you can store them in a sealed container at room temperature for up to 2 days. To reheat the caponata, warm it in a skillet over medium heat for 5–7 minutes, adding a splash of water or olive oil if it seems dry. Re-crisp the crostini in a 350°F (175°C) oven for 3–5 minutes. The caponata can also be frozen for up to 3 months; thaw overnight in the refrigerator and reheat gently.

Frequently Asked Questions

Do I have to salt the eggplant?
Salting helps draw out moisture and bitterness, resulting in a firmer texture and less oil absorption. If you skip it, the caponata may be slightly more watery and oily, but it will still taste good.

Can I use a different type of eggplant?
Yes, you can use Italian or Japanese eggplants, which are smaller and have thinner skins. You may need to adjust the cooking time slightly since they cook faster.

Is caponata served hot or cold?
Caponata is traditionally served at room temperature, which allows the flavors to meld. It’s also delicious warm, especially on fresh crostini.

What can I serve instead of bread?
For a low-carb option, serve the caponata on cucumber slices, bell pepper halves, or endive leaves. It also works well as a topping for baked potatoes or grilled vegetables.

Can I make this without sugar?
Yes, you can omit the sugar, but the sweet-and-sour balance is a hallmark of caponata. You could substitute a teaspoon of honey or a splash of orange juice for a different sweetness.

How do I keep the crostini crispy?
Make sure the bread is thoroughly toasted and cool completely before storing. If you’re serving them with the caponata, spoon the topping on just before serving to prevent sogginess.

More recipes to cook

Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes

Spotted an error? Tell us and we will correct it (corrections policy).