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1
Combine tomatoes, cucumber, red pepper, red onion, and garlic in a food processor; pulse until chunky but not fully puréed.
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2
Transfer to a bowl; whisk in olive oil, sherry vinegar, vegetable stock, and bread.
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3
Fold in sea salt and Aleppo pepper; chill at least 30 minutes.
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4
Before serving, adjust consistency with ice water; taste and adjust seasoning.
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5
Serve chilled, garnished with fresh basil if desired, and drizzled with additional olive oil.