tomato parmesan soup with grilled cheese croutons

Ingredients

• 4 tablespoons butter
• 1 small onion chopped
• 2 stalks celery chopped
• 2 medium carrots chopped
• 1 clove garlic chopped
• 1 teaspoon oregano dried
• 1 tablespoon basil dried
• 4 tablespoons all purpose flour
• 2 cans organic chopped tomatoes and liquid
• 4 cups chicken stock
• 1 teaspoon kosher salt
• 1/2 teaspoon black pepper
• 2 cups half and half
• 1 cup parmesan cheese