Preheat oven to 350 degrees Fahrenheit. Line a baking sheet with parchment paper and place tomatoes, peppers, and garlic on top. Drizzle with the olive oil and roast for 35 minutes until soft.
Immediately transfer peppers to a sealable glass container or plastic bag and let sit for at least 25 minutes, or until peppers are cooked through. Remove stems and seeds. You can either peel or leave the skin on the peppers after they rest.
Place tomatoes, garlic, peppers, dried basil, lemon juice, and salt and pepper in a high powered blender and blend until smooth, about 30 seconds. If soup is not cold enough, place in the refrigerator for 10 minutes.
Serve with optional toppings and enjoy!