Step 1

Place the bread cubes in a small bowl and add enough water to cover. Let soak until the bread is completely saturated, about 2 minutes. Drain and squeeze dry.

Step 2

Combine the bread, tomatoes, roughly chopped cucumber, bell pepper, garlic, 1/3 cup olive oil, 2 tablespoons vinegar, coriander, 1 teaspoon salt and a few grinds of pepper in a blender. (Work in two batches if necessary.) Blend on high speed until creamy and very smooth, about 2 minutes. Strain through a fine-mesh strainer into a large bowl or 8-cup liquid measuring cup. Cover and refrigerate until very cold, at least 2 hours and up to overnight.

Step 3

Season to taste with more salt and pepper and add up to 1 more tablespoon vinegar. Ladle into serving bowls, top with the finely diced cucumber and drizzle with more olive oil. Serve chilled.