01 - Preheat oven to 375°F for croutons preparation.
02 - Heat olive oil in a large pot over medium heat. Add onion and sauté until translucent, approximately 5 minutes. Add minced garlic and cook for 1 minute until fragrant.
03 - Stir in crushed tomatoes, tomato paste, vegetable broth, sugar, salt, and pepper. Bring mixture to a simmer and cook for 15 minutes, stirring occasionally.
04 - Toss bread cubes with olive oil, garlic powder, salt, and pepper in a large bowl. Spread evenly on a baking sheet and bake for 10–12 minutes, turning once, until golden and crisp.
05 - Remove soup from heat. Add chopped basil leaves.
06 - Using an immersion blender or countertop blender in batches, puree the soup until completely smooth.
07 - Return soup to low heat. Stir in heavy cream and gently heat for 2–3 minutes without boiling. Taste and adjust seasoning as needed.
08 - Ladle bisque into bowls, garnish with additional fresh basil, and top with crispy croutons.