Vegetable Samosa

Name: Vegetable Samosa
Ingredients: 1 cup all-purpose flour ((maida)); 2 tablespoon oil; 1/2 teaspoon salt; 1/4 teaspoon ajwain (optional); 1/4 cup water (you may need more); 1 pound mashed potatoes; 1-2 green chilies (finely chopped); 1/2 teaspoon ginger (crushed); 1/2 teaspoon garam masala; 1/2 teaspoon chili powder; 1/2 teaspoon dry mango powder ((amchur), optional); 1/2 cup green peas (boiled); few chopped cashews (optional); few raisins (optional); 1 tablespoon cilantro (finely chopped); vegetable oil for frying