An afternoon of examining online resources. I've examined about 2 dozen variations of Onion Tomato Masala, aka; OTM or Bhuna Masala, and made notes and comparisons. There are many varied recipes but not too surprisingly, they are not all that different. They range from 9 ingredients to 20 and average around 15 including spices. There is a very stable core group of ingredients and then there are a few variables and then there is a small number of not so common tweaks. From this examination I could make a few different batches and decide where to go from there.
Obviously, Onion and Tomato is found in all, but the ratio varies from 2:1 through equal to 1:2.
Garlic and Ginger found in all, as a paste which varies from chunky to watery. 1 example had a considerable amount of extra chopped garlic added to the frying onions.
Green Chilli is found in many, but not all, and always chopped small. There is usually no blending or blitzing of the finished Masala but there was in one or two. Most simply rely on fine rough chopping and cooking down to melting point.
Oil varied from just enough to fry the onions to swimming. One video showed the cook pouring a cup of water into the frying onions.
Whole spices common to nearly all: Tej Patta, Green Cardamom, Black Cardamom, Cloves and Black Peppercorn. Amounts varied.
Whole Spice found in some: Cinnamon / Cassia Bark, Cumin seed (found in several).
Whole Spice found in a couple: Blade Mace.
Note: One or two recipes used Garam Masala powder instead of any whole spices.
Powdered Spices common to nearly all: Turmeric, Chilli Powder (either Red CP, Kashmiri CP or Deggi Mirch) and Salt.
Powdered spices found in some: Cumin (if seeds not used) and Coriander in only a few.
Powdered Spices found in single recipes: Kitchen King, Maggi Masala ae Magic (Indian spice mix by Maggi).
Other ingredients found occasionally: Cashew / melon seed (magaz) paste was added to one or two and in only one I saw there was chopped coriander.
I'll be giving this a try. Now all I have to do is find a soup mix recipe that matches the requirements.
edit: Done and cooking as I sit here.
velout