Preheat the oven to 425 degrees F. Line a rimmed baking sheet with foil.
Toss the eggplant, bell peppers and shallots with the olive oil, garlic, 1 1/4 teaspoons salt and 1/2 teaspoon pepper. Spread the vegetables on the lined baking sheet and roast, stirring occasionally, until softened and browned, about 45 minutes. Let cool.
Transfer the vegetables to a medium bowl and stir in the parsley, capers, raisins, lemon zest, lemon juice and red pepper flakes. Season with salt and pepper. Sprinkle with the pine nuts.
Serve the caponata with baguette slices.
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