Try this. Chop one onion, finely and fry In olive oil in a wok(or pan) until glassy. Add one crushed clove of garlic, cook a little more ( not too much in case it burns) add Garam Masala plus a little ginger and some chilli( fresh or dried). I adore cardomoms, so i add some here. Fry everything gently. If it starts to burn, quench it with a little water. When the air is really scented, add a can of chopped tomatoes. you can now add some coconut milk, or cream, or yoghurt.
If you use this to heat your left overs in, be gentle with the heat, or it will "split" . A little cornflour dispersed in a little water, will help prevent splitting, but you may prefer not to use it for extremely low carb eating. I don't know quantities, because I just put ingredients in until it all looks and tastes right. It's often better after a day's standing in the fridge. to blend the flavours
Hana