To prepare soup: In a large pot or Dutch oven over medium heat, melt 1 tablespoon butter and olive oil. Add onion and garlic and sauté until onion is translucent, about 5 minutes.
Add tomatoes (and juice from tomatoes), water, cream, salt, pepper, red pepper flakes, celery seed, oregano and sugar. Increase heat to high and bring to a boil, then lower heat to a simmer and cook for 15 minutes.
Remove soup from heat and purée in batches in blender (or use an immersion blender). Return soup to pot and reheat to a simmer, seasoning to taste with more salt and pepper. Ladle soup into bowls and serve hot, garnished with croutons.
Note: "Instead of Beecher's Flagship, you can substitute white Cheddar or regular Cheddar cheese," writes Tom Douglas in "The Dahlia Bakery Cookbook." "Beecher's Flagship is slightly crumbly, so it makes sense to grate it. If your cheese is firmer, you can, if you prefer, slice it thin instead." (The cheese is available at Lunds & Byerlys, Kowalski's Markets, Jerry's Foods and other local supermarkets; order online at beechershandmadecheese.com). Douglas added that the bakery uses a potato loaf for this sandwich. "You can use any rustic bread as long as it doesn't have large holes," he wrote. "Otherwise the cheese will seep through the holes and stick to the pan."
• 8 thick-cut bacon slices