Dice the tomatoes and strawberries into bite-sized pieces.
Cut the mozzarella pearls in half or in quarters depending upon the size.
You want to cut all of the ingredients so they are similar in size.
Slice the basil into thin pieces.
Place the strawberries, tomatoes, mozzarella, and basil into a small bowl.
Add balsamic vinegar, olive oil, salt, and pepper, and gently mix.
Refrigerate for 30 - 45 minutes.
Serve on a bed of baby spinach or lettuce of your choice.