Add the olive oil to the instant pot and turn on the saute function. When the oil starts to sizzle add the meat.
Cook the meat until Browned.
Add garlic powder, onion powder, black pepper and italian seasoning to the meat (liberally). Then add the diced onions and green peppers. Make sure you saute the meat and vegetables together. This helps the flavors "seal."
Add the cans of diced tomatoes, 1 onion packet, and tomato sauce. Make sure to stir the contents together.
Then add the dry spaghetti noodles. I usually break the noodles in half so they can fit into the instant pot. Turn off the saute function.
Add 2 cups of water on top of the noodles
Close the lid and steam valve on the instant pot.
Cook on Manual for 25 minutes. Allow natural release for 10 minutes (or force release)
Enjoy hot!