2 tbs olive oil
1 med yellow onion, chopped
1 rib celery, minced
1 lg eggplant, peeled and diced
1 med red OR green bell pepper, seeded and chopped
3 cloves garlic, minced
1 (14.5 oz) can diced tomatoes, drained and chopped
1 tbs tomato paste
2 tbs red wine vinegar
1 tbs sugar
1/2 tsp dried basil
1/4 tsp dried oregano
1/4 tsp red pepper flakes, or to taste
salt and freshly ground black pepper
1/3 cup black olives, drained, pitted, and sliced
1 tbs capers, drained and chopped
1 tbs minced fresh parsley leaves
heat the oil in a large skillet over medium heat. add the onion and celery, cover, and cook until softened, about 5 minutes. add the eggplant, cover, and cook, stirring occasionally, until the eggplant begins to soften, about 5 more minutes.
transfer the mixture to 4-qt slow cooker. add the bell pepper, garlic, tomatoes, tomato paste, vinegar, sugar, basil, oregano, and red pepper flakes, and season with salt and pepper. cover and cook on LOW until the vegetables are soft but still hold some shape, about 6 hours.
when the vegetables are cooked, stir in the olives, capers, and parsley. taste to adjust the seasonings. transfer the caponata to a bowl and let cool. serve at room temperature. if not serving right away, cover and refrigerate until needed.
serves 6