Rinse the mushrooms well in water.
Drain and wipe them dry.
Trim the earthy base stalks a little.
In a mixing bowl, take all the mushrooms.
Add all the spice powders, carom seeds, salt and oil.
Keep aside to marinate for 20-25 minutes.
Preheat the oven to 200 degrees C.
After 20-25 mins, add the gram flour and mix well.
Bake in the oven for 25-30 minutes or till the mushrooms are cooked and tender and are browned.
After 15-20 minutes when grilling, you can turn the skewers so that there is uniform grilling.
If you want you can sprinkle or spray some oil on the mushrooms after 15-20 minutes.
Sprinkle some lemon juice, chaat masala, coriander leaves on the mushroom tikka.
Serve mushroom tikka hot or warm with a green chutney, rotis or naan or even bread.