Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Halve the Roma tomatoes and the yellow onion, then place them on the baking sheet along with the peeled garlic cloves.
Drizzle the vegetables with extra virgin olive oil and season with sea salt and black pepper.
Roast the vegetables for 25 to 30 minutes until the tomatoes are blistered and the onions are slightly charred.
While the vegetables roast, poach or pan-sear the chicken breast until the internal temperature reaches 165°F, then shred it using two forks.
Transfer the roasted tomatoes, onion, garlic, and any accumulated juices into a high-speed blender.
Add the chicken bone broth, silken tofu, and fresh basil leaves to the blender.
Blend on high speed until the soup is completely smooth and reaches a velvety consistency.
Pour the soup into a bowl and stir in the shredded chicken breast before serving immediately.