Sauté garlic and diced onion in olive oil over medium heat in a large pot for approximately 5 minutes, allowing them to release their aroma. Introduce the celery, carrots, and butternut squash, cooking while stirring frequently for an additional 5 minutes. Incorporate the orzo and continue cooking for 5 minutes, ensuring it is well integrated. Pour in the water and stir in the cannellini beans, peas, turmeric, salt, and chopped herbs. Bring the mixture to a boil, then reduce the heat and allow it to simmer for 15 minutes or until the vegetables are tender when pierced with a fork. Conclude by adding the lemon juice, tasting and adjusting salt as needed, and garnishing with extra herbs and freshly ground black pepper before serving.