Simple Tomato Soup

Ingredients (12)

• + 1 tablespoon unsalted butter or margarine add to pantry
• + 1 tablespoon olive oil add to pantry
• + 1 onion, thinly sliced add to pantry
• + 2 large garlic cloves, peeled and crushed add to pantry
• + 2 (28 ounce) cans whole peeled tomatoes add to pantry
• + 1 cup water add to pantry
• ✓ 1 tablespoon sugar
• + 1 teaspoon salt, plus more to taste add to pantry
• + freshly ground black pepper to taste add to pantry
• ✓ 1 pinch red pepper flakes
• + ¼ teaspoon celery seed add to pantry
• + ¼ teaspoon dried oregano add to pantry