We roasted red potatoes, sweet potatoes, butternut squash, onions, garlic, carrots, green beans, green peppers, and celery on a sheet pan with some olive oil. While that was in the oven I made a roux with olive oil, butter, flour, milk, and chopped sage, rosemary, and parsley. Mixed it all together with leftover Costco roasted chicken, the covered with pastry.
All the veg and herbs came from the garden.