Mumbai Masala Pav and Bhaji Recipe

Name: Mumbai Masala Pav and Bhaji Recipe
Ingredients: 1 medium onion; 2 medium tomatoes; 1 medium capsicum; 2 boiled potatoes; 2 tbsp chopped beans; 2 tbsp chopped carrot; 4 tbsp peas; 1 tsp coarse ginger garlic paste; 2 green chillies optional; 1/2 teaspoon cumin; 1/4 teaspoon turmeric powder; 1/2 teaspoon red chilli powder; 2 teaspoon pav bhaji masala,; 2 tablespoon butter; 1/2 cup water; to taste salt; 4 pav; 1-2 tablespoon butter for roasting pav; For garnishing; 1 small onion; 1 small lemon,; 2 tbsp chopped coriander leaves