Heat 2 tbsp butter and 1 tbsp oil in a pan. Add 1 tbsp cumin seeds and sauté.
Add 1 cup sliced onions and sauté until they turn translucent.
Now add the prepared chilli-garlic paste and cook until the oil starts separating from the sides.
Add 1 cup sliced tomatoes and salt to taste. Mix well and cook until the tomatoes become soft, mushy, and blend into the gravy.
Add ½ cup capsicum, ½ cup cabbage, and ¼ cup green peas. Sauté the vegetables on high flame for 2–3 minutes.
Now add ¾ cup boiled potato pieces, 1 tsp red chilli powder, 1 tsp coriander powder, and 2 tbsp pav bhaji masala. Add a little water if needed and mix well.
Add the cooked rice to the masala and mix gently until everything is well combined.
Finally, add 1 tsp lemon juice and some chopped coriander leaves. Mix well.
Cover and cook for 2 minutes so the flavors combine nicely.