Heat olive oil in instant pot
on SAUTE mode (high). When display reads HOT, add ground meat and don't stir for a minute or so, this allows the meat to brown on one side. If making this sauce vegetarian, skip this step. Break up the meat with a wooden spoon or spatula and stir. Add chopped veggies and saute for another minute. Add spices and crushed tomatoes or marinara sauce. If using crushed tomatoes, add more seasoning and spices (check ingredient section). Stir everything together. If the sauce looks thick, add 1/4-1/2 cup water. Close lid. Vent set to Sealing. Pressure cook on Manual/Pressure Cook for 3-4 minutes.