This Velvety Tomato Curry Comes Together in Under 30 Minutes

Name: This Velvety Tomato Curry Comes Together in Under 30 Minutes
Ingredients: 7 tablespoons (100ml) neutral oil such as vegetable or sunflower oil; 1 medium yellow or red onion (8 ounces; 227g), cut into 1-inch chunks; 2 plum tomatoes (8 ounces; 227g total), cut into 1-inch chunks; Kosher salt; 1 teaspoon cumin seeds; 1 teaspoon black mustard seeds; 1 tablespoon chana dal (split desi chickpeas); 1 tablespoon moong dal (split mung/moong beans); One 14-ounce (397g) can whole peeled tomatoes, pureed in a food processor; 1 teaspoon garam masala; 1 teaspoon ground cumin; 1/2 teaspoon granulated sugar; 1/2 teaspoon ground turmeric; Cooked basmati rice and/or flaky flatbreads such as paratha, for serving