Instructions

Begin by preparing the pesto sauce. Put all the ingredients (parsley, walnut, and garlic cloves) in a blender and blend until the ingredients turn into a smooth paste.
Add olive oil to the paste slowly. Use no more than two-third of a cup of olive oil. Keep blending till the paste gets as smooth as possible.
Transfer the paste into a large bowl and add parmesan cheese, salt, and pepper. Stir them together until the mixture turns uniform.
Slice the bread loaf in half or as many slices you wish. Spread pesto on one side of the bread slice evenly. Add mozzarella cheese and tomato slices on top of it.
Apply pesto on the bread slice that will make the upper half of the sandwich.
Press the two halves together firmly and keep the sandwich on the panini machine or any other sandwich making machine.
Remove the sandwich as the cheese melts and the bread crust becomes crisp.
Serve on a dish with marinara sauce or any other sauce of your kid’s choice.