First pre fry the paneer in a little oil to brown lightly on all sides. You dont have to do this but it really is better if you do.Drain on kitchen paper.
Trim the broccoli and boil or steam for 5-6 mins until tender but firm to the bite. Drain and cool under cold running water.
Heat the oil in a wok or large frying pan, then add the asafoetida, cumin seeds, sesame seeds, chilli, mustard seeds and the curry leaves. Cook for 1 min until fragrant, then add the onion and cook another 2 mins.
Throw in the paneer, ginger and garlic, and season. Cook on a medium heat for 4-5 mins ( or until the paneer turns golden if you havent fried it first) . Add the broccoli and mix through the paneer and spices, then add lemon juice, mace and twist of pepper.