Place all the ingredients for the sauce in a blender and blend until a chunky sauce forms. It the sauce is a bit thick for your liking you can thin it out with some water.
For the pizzas
Turn the grill on and heat the pitas for about 1 minute.
Remove from the oven and cover the pitas with about 1 teaspoon of the chimichurri sauce and cherry tomatoes and top with cheese.
Place back under the grill until the cheese is bubbling and brown.
Finish with micro greens and a drizzle of balsamic vinegar.