1teaspoondried oregano or 1 Tablespoon fresh oregano
1bay leaf
1/4cupfresh basiltorn
4cupschicken or vegetable broth
½cupbutter
½cupflour
1cupgrated Parmesan cheese
2cupshalf and halfwarmed (can omit)
salt and pepper to taste
Instructions
Add tomatoes, celery, carrots, onions, oregano, basil, chicken broth and bay leaf to a large slow cooker.
Cover and cook on LOW for 5-7 hours or high for 3-4 hours, until flavors are blended and vegetables are soft. Using an immersion blender, blend broth and veggies together after cooking. (If you prefer a chunkier texture you can leave it as is or even blend just some of it.)
About 30 minutes before serving prepare the roux. Melt butter over low heat in a skillet and add the flour. Stir roux constantly with a whisk for 5-7 minutes. Slowly whisk in 1 cup hot soup. Add another 1-2 cups and stir until smooth. Add all back into the slow cooker. Stir and add the Parmesan cheese, warmed half and half, salt and pepper.
Cover and cook on LOW for another 30 minutes or so.