STEP 1
Tip all of the ingredients for the gazpacho into a large bowl and mix well. Cover and chill for 4-5 hours or overnight.
STEP 2
Use a stick blender or food processor to whizz the gazpacho mixture until very smooth, adding more salt or sherry vinegar to taste. Chill.
STEP 3
Heat the oven to 200C/fan 180C/gas 6. Put the sourdough croutons and garlic onto a baking tray, drizzle with the oil, season and toss well. Roast for 12-15 minutes or until really crisp. Add the pesto to the tray and toss really well again, then sprinkle over the manchego and cook until crisp and bubbling.
STEP 4
Spoon the gazpacho into bowls, then top with the cheesy croutons and a drizzle of oil.