Thoroughly wash your leafy greens, let them dry off for a bit, then pluck or chop them into bite-sized pieces.
Cut your fresh mozzarella into small pieces or, if you are using bocconcini, chop those into halves or quarters.
Continue by slicing the red onion into half-moons or small chunks.
Carefully wash and drain the raspberries.
Coarsely crumble the walnuts by hand.
Use the remaining ingredients to prepare your dressing using a fork or a whisk.
Toss all ingredients into a large bowl and combine well.