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