Add the onion, tomatoes, and garlic to a food processor and pulse to chop until a coarse mixture forms.
Heat the Instant Pot to High/More Sauté mode. Once hot, add the onion mixture, ground beef, cumin seeds, spice powders, and salt. Sauté for 2-3 minutes. You'll notice the mixture starts to release water.
Cover and pressure-cook on High for 15 minutes. You do not need to add water.
Allow the pressure to naturally release for 5 minutes, then manually release any remaining pressure. Select Sauté - High/More again, and sauté for 5-7 minutes, or until most of the water evaporates.
Add the ingredients listed under ‘After Pressure Cooking’ and continue to sauté for another 3-5 minutes, until the oil starts to release. Taste and adjust salt and spices as desired. Cancel the Sauté function and add cilantro leaves and lemon juice.