After the vegetables are chopped, add olive oil to the instant pot and toss in the onions, celery, carrots, and garlic.
Saute, stirring often for 5-10 minutes (make sure not to caramelize them)
Add the tomato paste and all the spices. Blend well.
Add all the remaining ingredients.
Mix everything really well, making sure to break up the ground beef completely.
Set to Meat/Stew setting for 35 minutes. Close the lid.
After it's done, let it naturally depressurize for about 5 minutes.
Remove the lid and stir well for about 5 minutes.
Notes
*This Bolognese sauce pairs beautifully with a variety of pasta, such as spaghetti, fettuccine, or rigatoni. For a lower-carb option, serve it over zucchini noodles or spaghetti squash.