Chicken Pot Pie Soup

I started this soup with some homemade stock that I let simmer all day so that it got concentrated and filled with as many beneficial nutrients as possible.

1 t. oil
1 onion, diced
2 carrots, diced
2 celery stalks, diced
4 cloves garlic, minced
Salt and pepper, to taste
4 c. chicken stock
2-3 potatoes, peeled and diced
2 c. [...]