Vegetarian Biryani Pilaf

Name: Vegetarian Biryani (Pilaf)
Ingredients: 2 cups Basmati rice; 1 cup chopped boiled potatoes; 1 1/2 cups chopped tomatoes; 1/2 cup chopped green bell peppers; 1/2 cup chopped red onions; 1/4 cup green peas; 1/4 cup corn; 1 tablespoon minced green chillies; 1 tablespoon minced garlic; 1 tablespoon shredded ginger; 1 tablespoon red chili powder; 1 tablespoon garam masala; 3 tablespoons biryani masala; 1 tablespoon cumin seeds; 3 tablespoons vegetable oil; salt, to taste