Drain spinach, pressing with the back of a spoon to drain as much as possible of the liquid.
Into a bowl, mix together well drained spinach, cream cheese, chopped onion and carrot, milk, lemon juice and pepper.
Cover with plastic wrap.
Refrigerate overnight.
Remove top part of bread.
Remove inside of bread, leaving a 1-inch [2.5-cm] thick crust all around.
Dice removed top and white part of bread.
Fill bread crust with spinach mixture.
Sprinkle with paprika.
Serve as you would a dip, with bread dices all around.