To prepare the croutons

• Cut the bread into small cubes. If the bread you are using has a thick crust it is better to cut this off and just use the central part of the bread. If the crust is soft it can be left on if you wish. 
• Place the cubes of bread in a bowl. Sprinkle a little salt evenly over the bread and then drizzle some olive oil over the bread cubes. Toss the bread cubes taking care not to break or squash them. 
• Transfer to a baking sheet and bake at 180^oC, 350^oF, gas mark 4. 

  Bake the croutons until they start to turn golden. This is likely to take around 10 minutes or so but check after they have been in the oven for a few minutes and check again regularly. The croutons will bake quickly and some are likely to cook quicker than others particularly those at the edge and any which are smaller. Toss part way through the cooking time so that they bake evenly. If some cubes look ready before others have finished cooking they can be removed from the tray before returning the rest to the oven to finish baking. 
• Your croutons are now ready to serve, or they can be stored in an airtight container or frozen.