Hi Sub, here are my 2 cents worth on this topic and being from India it may help
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I would ask to steer clear of any curry paste even creating your own and storing it. It's immensely confusing with all the options available today and to top it off regions claim their own curry pastes and powders (popular one is Madras and there is nothing special about that particular powder)
A good approach is to make two make two spice powders if you like Indian food and sometimes want to experiment with it.
Garam Masala being one of them (here is the one I use and works for almost all recipes, can't think of any it does not work on)
2 sticks of cinnamon
4 cloves
4 cardamom pods
6 whole black pepper corns
1 star anise
1 black cardamom pod (if we are being too technical. This is different from it's green cousin and I don't believe are related at all)
1 tsp of grated nutmeg
1 tsp of black cumin seeds (again only if we are being technical. This is distinctly different from the regular cumin seeds you get in super markets)
Dry roast, grind and place in an airtight container
Make a curry powder (here is how I make mine)
2 dried arabol chillies
2 tbsp of corrainder seeds
2 tbsp of cumin seeds
1 tsp of fennel seeds
1/2 tbsp of mustard seeds
1/2 tbsp of fenugreek seeds (again if we are being technical)
Dry roast, grind and save in an airtight container. You can mix this with some turmeric about 2 tbsp and some paprika also about 2 tbsp for color.
To make any curry, saute your onions first in a fat medium (any oil is fine, I have even used light olive oil for cooking). I don't think we Indians cook with just ghee as indicated by the Western culinary world. It's funny I don't even have ghee at home. I am not a huge fan of using saturated fat.
After the onions cookdown, add the ginger and garlic (finely grated). Next add the curry powder you prepared and also a 1/4 tsp of garam masala (it's strong stuff so don't add too much). Next add tomatoes, tomato sauce, coconut milk, yogurt, cream (whatever your cooking base is even water or stock is fine) and meat and veggies and you are all set.
I have never seen this fail and it is a much better option than making different kinds of pastes and storing them in your refrigerator where the smells can get into other foods.