Spicy indian style corn on crackers

Ingredients

• 1 onion finely chopped
• 1 small capsicum finely chopped
• 2 small tomato finely chopped
• 1 cup boiled american sweet corn
• 1 tsp pav bhaji masala
• 1/2 tsp garam masala powder
• 1 tsp chilli powder
• 2 tbsp tomato ketchup
• 2 tbsp cream
• 3 tbsp milk
• 2 tbsp finely chopped coriander leaves + for garnising
• 1 tbsp butter
• 1 tsp oil
• salt to taste