Makes approximately 3 cups; can be halved, but it keeps well, so go ahead and make the whole recipe.
For the caponata:
2 large eggplants, cut into small dice, seasoned generously with salt and pepper
1/2 cup extra virgin olive oil
1 medium red onion, cut into small dice
2 medium red peppers, cut into small dice
4 large cloves garlic, thinly sliced
1/4 tsp mild red pepper flakes
1 cup canned chopped tomatoes
1/2 cup balsamic vinegar
1/2 cup red wine vinegar
5-6 Tbsp agave nectar, to taste
1/2 cup fresh basil, roughly chopped
1/2 cup fresh parsley, roughly chopped
For the toasts:
1/2 lb sliced cheese of your choice: fontina, fontal, manchego, mozzarella
1 large baguette or other crusty bread, sliced thinly on a diagonal
In a very large nonstick frying pan, heat 2 teaspoons of olive oil over medium-high heat. Add as much of the eggplant to the pan as will fit in a single layer, and cook, stirring frequently, until the eggplant is very brown (almost burnt). Transfer the eggplant to a large mixing bowl, and repeat with remaining eggplant.
When all the eggplant is seared and removed from the pan, add the remaining olive oil, onions, peppers and garlic, and reduce the heat to medium-low. Sauté until soft (8-10 minutes).
While onions, pepper, and garlic are cooking, combine the tomatoes, vinegars, honey and red pepper flakes in a pot. Turn the heat to high, bring to a boil, and cook until the mixture is reduced by half, 3-4 minutes.
Add the eggplant back into the pan with the onions and peppers. Cook over low heat until the eggplant is cooked through; then add the tomato-vinegar mixture. Cook 5 minutes, until the mixture in the pan is thickened and most of the liquid has evaporated.
Taste and adjust seasoning with salt and pepper, or agave nectar, if necessary.
Remove pan from the heat and transfer to a serving bowl. Allow to cool to room temperature. Fold in the chopped basil and parsley.
Serve at room temperature, or chilled. Can be made up to 1 week ahead.
To assemble the toasts: Heat the oven to 400°F. Place the slices of bread in a single layer on a baking sheet. Toast for 5 minutes on one side.
Remove the baking sheet and flip the bread slices. Top each one with a piece of cheese, and return to the oven. Bake until the cheese has just begun to melt, then remove from the oven.
Spoon some caponata over each slice of bread, and serve.