Potato sandwich(Aloo sandwich)

Name: Potato sandwich (aloo sandwich)
Prep time: 10 min
Cook time: 15 min
Total time: 25 min
Yield: 4
Ingredients: 1/2 cup Cilantro; 1 tsp Coriander, powder; 1 small piece Ginger; 1 Green chili peppers, hot; 1/2 cup Green peas; 4 Potatoes, medium-sized; 1 Red onion, small; 4 tbsp Chutney, green; 4 tbsp Tomato ketchup; 1 Black pepper, Ground; 1/4 tsp Garam masala; 1/2 tsp Red chili powder; 1 Salt; 1 tsp Butter/ olive oil; 1/2 tbsp Cooking oil; 1/2 tsp Cumin seeds; 8 slices Sandwich bread; 1 cup Mozzarella/ any melting cheese