Combine the delicious freshness of homemade pesto with mozzarella and pasta for a delectable treat in this orzo pesto salad. Great for a barbecue, a hot weather dinner, or the perfect side dish.
Add the basil leaves, Parmesan, garlic, salt, and pepper to a small food processor or single-serve blender. Pulse to roughly chop the ingredients. Add 6 tablespoons of the olive oil and continue to pulse until all ingredients are finely chopped.
Add the pistachios and pulse again to roughly chop the nuts. Keep visible pieces of pistachios in the pesto for more texture in the pasta salad. Pour in the remaining 4 tablespoons of olive oil as well as a hefty pinch of sugar and blend just until the oil is incorporated.
Place the pasta in a medium bowl and stir in the tomatoes, scallion, and mozzarella balls. Pour in the pesto and stir well. Add more salt and pepper to taste if desired. Serve right away or chill 30 to 60 minutes before serving. Top with more chopped pistachios and basil leaves for garnish before serving.