I am posting a very basic recipe of vegetable stock. it needs to simmer for around 30-45 min. in order to extract all the flavours from the vegetables.
1 medium sized onion peeled and chopped
1 medium capsicum chopped
1 tomato chopped
1 carrot peeled and chopped
1/2 cup peas
1/2 cup cabbage
1/2 cup cauliflower florets
3 cloves garlic
1 green chilly
1 medium turnip chopped
1 bay leaf
2-3 pepper corns (kali mirch whole)
Take a vessel put in the water and all the vegetables.
In a piece of cloth put all the spices and a tie a knot. Now place this in the vessel.
When the water starts boiling lower the stove.
Let the mixture simmer for next 30-40 min.