Soup seasoning: I no longer buy finished products; it can last up to a year

Homemade Soup Seasoning
Homemade soup seasoning is a wonderful alternative to store-bought broths and spice blends. Not only does it add a fresh, individual touch, but it also allows you to use whatever herbs and vegetables you have on hand.

Ingredients:
1 celery stalk
For a hearty, spicy base.
2 leeks
Adds a mild oniony note.
4 medium onions
For added depth and flavor.
1 bunch parsley
For freshness and a herby aroma.
1 bunch chives
Adds a light oniony note.
1 bunch garlic chives
For a garlicky flavor.
1/2 garlic bulb
For intense garlicky aromas.
1 bunch herbs of your choice
Whatever the garden is currently producing (e.g., thyme, rosemary, tarragon).
Salt to taste
Approximately 10g of salt per 100g of vegetables to preserve the mixture.
Preparation:
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