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Melt 1 tablespoon of butter in a dutch oven or large saucepan.
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Soften the onion and garlic in the butter, about 5 minutes.
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Add the tomatoes with juice, water, heavy cream, salt, red pepper flakes, celery seed, oregano, and sugar. Bring mixture to a boil, then simmer at a lower heat for 15-20 minutes.
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Cool slightly and puree using an immersion blender.
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Reheat to a simmer, and add more salt and pepper to taste.
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While the soup is simmering, preheat the oven to 350°F.
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Place 1 tablespoon of butter on a baking sheet or jelly roll pain.
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Place the pan in the oven while preheating the oven to melt the butter, greasing the pan.
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Heat the remaining 3 tablespoons of butter in a small saucepan and cook over medium heat, stirring frequently.
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Remove the saucepan from the heat when the butter is golden brown with small brown bits floating on top.
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Throw the cubes of bread in a bowl and pour the browned butter over them, stirring to coat all of the cubes.
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Season with salt and pepper and stir again.
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Spread the bread over the warmed baking sheet.
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Place it in the preheated oven and bake until the croutons are golden brown, approximately 20 minutes.
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Allow the croutons to cool slightly.
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Garnish the hot soup with the croutons, chopped basil, and shaved parmesan.
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Enjoy hot!