In a deep bottomed skillet add the grated potatoes, boiled spinach, cauliflower, tomatoes and peas .Add a little water and cook well.
In a frying pan melt 3tbsp butter .Add 2 grated onions, all spice powder, ginger garlic paste, and lemon juice. Mix well
Pour this mixture into the vegetable pot, mix well and mash with a fork. Cook on a low flame. The bhaji is ready
To prepare the bun
Slice each bun into two halves. Melt butter on the griddle and toast the buns
To prepare the raita in a mix bowl, add 1 cup yogurt, 1tsp roasted cumin,1tsp crushed red chilies and salt as required. MIx well
Place the bhaji in a serving platter. Add 2-3 tbsp of butter followed by 2-3 finely chopped green chilies and 1tsp chat masala. Garnish with onions and chopped coriander. Serve with the raita and toasted buns.