Heat oil in a pan
Add cumin seeds and let them splutter
Add chopped onions and sauté until golden
Add ginger-garlic paste and cook briefly
Add chopped tomatoes and cook until soft
Add turmeric, red chili powder, coriander powder, and salt
Cook the masala until the oil separates
Add sliced mushrooms and mix well
Cook for a few minutes until mushrooms release water
Add a little water if needed
Cover and simmer until mushrooms are tender
Add garam masala and mix
Garnish with chopped coriander leaves
Serve hot with rice or roti