Instant Pot Sambar (Indian Split Pigeon Pea and Vegetable Soup)

Name: Instant Pot Sambar (Indian Split Pigeon Pea and Vegetable Soup)
Cuisine: Indian
Ingredients: 1 cup split pigeon peas (toor dal, soaked for 1 hour); 1 tablespoon oil of choice; ½ teaspoon black mustard seeds; ¼ teaspoon fenugreek seeds (methi); 15 curry leaves; 1 teaspoon minced garlic (or garlic paste); 1 teaspoon minced ginger (or ginger paste); 2 teaspoons coriander powder; 2 teaspoons salt (adjust to taste); 1 teaspoon paprika; ½ teaspoon turmeric; ¼ teaspoon black pepper; ¼ teaspoon cayenne; ¼ teaspoon roasted cumin powder*; ⅛ teaspoon hing (optional); 4 cups water; 3 cups chopped mixed vegetables* (see notes below); 1 tomato (chopped); ½ onion (chopped into chunks); 1 teaspoon sugar or jaggery (to taste); 1 teaspoon tamarind paste