In the Instant pot, brown the ground beef, onion, and garlic
Once the meat is cooked and the onions are translucent (and smelling delicious), add the chopped sweet potatoes, tomatoes and sauce, frozen spinach, broth, and spices.
Stir thoroughly to make sure that the sweet potatoes are fully submerged in broth, and put the lid on the Instant Pot.
Make sure the valve is closed, and cook on "Soup" or "Stew" for 7 minutes.
After it's done cooking, you can release the Instant Pot valve and let it come back down to normal pressure.
Stir it while it cools down, to make sure that everything is cooked evenly.