Combine the quinoa with 2 cups water in a medium saucepan. Bring to a boil. Reduce the heat to low, cover, and simmer for 15 minutes or until the quinoa absorbs all the liquid. Refrigerate until cool. If you want to eat the salad right away, transfer the warm quinoa to a fine-mesh sieve and rinse under cold water to reduce the temperature.
Marinate the tomatoes:
Combine the tomatoes with minced garlic, extra virgin olive oil, Aleppo pepper, lemon juice, and lemon zest. Season with a big pinch of salt and pepper. Toss to combine. Let stand for 15 minutes.
Finish the salad:
Add the mozzarella pearls, parsley, basil, and balsamic vinegar to the tomatoes. Add the cooled quinoa and toss to coat. Taste and adjust the seasonings to your preference. Refrigerate until ready to serve.
To serve:
Transfer the salad to a serving bowl and garnish with fresh basil leaves if desired. Enjoy!