Simple Tomato Soup - cooking recipe

Ingredients

1 tablespoon unsalted butter
1 tablespoon olive oil
1 onion, thinly sliced
2 large garlic cloves, peeled and crushed
2 (28 ounce) cans whole peeled tomatoes
1 cup water
1 tablespoon sugar
1 teaspoon salt, plus more to taste
freshly ground black pepper to taste
1 pinch red pepper flakes
1/4 teaspoon celery seed
1/4 teaspoon dried oregano

Preparation

Heat butter and olive oil in a large saucepan over medium-low heat and cook onion and garlic until onion is soft and translucent, about 5 minutes. Add tomatoes, water, sugar, salt, pepper, red pepper flakes, celery seed, and oregano. Bring to a boil. Reduce heat, cover, and simmer for 15 minutes.
Remove from heat and puree with an immersion blender. Reheat soup until warm and season with more salt and pepper if desired.