Yellow Aalu Chutney

Name: Yellow Aalu Chutney
Ingredients: 1 pound potatoes; skin scrubbed clean and kept intact; 1 large onion; chopped; 3 green chilies; finely chopped; 2 tablespoons freshly chopped Coriander leaves; 1/4 cup fresh mint leaves; 3 inch piece of ginger; chopped; 1/2 teaspoon salt; 1/2 teaspoon turmeric powder; 1 teaspoon raw Urad dal; 1 medium tomato; chopped; 1/2 cup hot water; juice of a lemon; 2 tablespoons sunflower oil