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

Name: Instant Pot Sambar (Indian Split Pigeon Pea and Vegetable Soup)
Cuisine: Asian, 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; 1 teaspoon minced ginger; 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*; 4 cups water; 3 cups chopped mixed vegetables* (see notes below); 1 tomato, chopped; ½ onion, chopped into chunks; 1 teaspoon sugar; 1 teaspoon tamarind paste