Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Place the halved Roma tomatoes, diced yellow onion, and peeled garlic cloves on the baking sheet.
Drizzle the vegetables with extra virgin olive oil and sprinkle evenly with sea salt, black pepper, and dried oregano.
Roast the vegetables for 25 to 30 minutes until the tomatoes are blistered and the onions are slightly caramelized.
While the vegetables roast, pan-sear the chicken breast in a skillet over medium heat for 6-7 minutes per side until the internal temperature reaches 165°F, then slice into thin strips.
Transfer the roasted vegetables and any juices from the pan into a high-speed blender along with the chicken bone broth, cottage cheese, and fresh basil.
Blend on high speed for 60 seconds until the soup is completely smooth, velvety, and vibrant in color.
Pour the soup into a bowl and top with the sliced grilled chicken and an extra sprig of fresh basil before serving.