This cold crab spread can be made up to a couple of days ahead. If you want to make the crostini ahead, let the slices cool completely on a wire rack, then place them in a zip-top plastic bag.
Combine the first 11 ingredients in a large bowl, stirring until well combined. Gently fold in crabmeat.
Place bread slices in a single layer on a baking sheet. Brush 1 side of the bread slices evenly with the olive oil. Broil 1 minute or until lightly browned. Serve with spread.
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