Choose sturdy bread: Ciabatta works so well here because it can absorb some of the dressing and moisture from the fillings without falling apart while it's being pressed.
Don't rush the pressing time: Give the sandwich about 8 hours or leave it overnight. It compacts the layers and makes a very full sandwich much easier to slice and eat.
Keep the tomato slices thin: There's already dressing and olive salad in the sandwich, so thin tomato slices add freshness without introducing too much extra moisture.
Don't be shy with the arugula: I wouldn't leave it out. Its peppery bite cuts through the salami, ham, cheese and olive salad, and a couple of readers have specifically commented on how much they liked it here.
Wrap it tightly before pressing: A snug layer of plastic wrap helps keep all those fillings in place while the weight compresses the sandwich.
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