Press the Saute button and select High. Wait until the display says "Hot" and then add the oil. When the oil is hot add the chopped onions and cook for 3 minutes or so.
1 tablespoon oil, 1 onion, chopped
Add the minced garlic and cook for about 1 minute.
3 cloves garlic, minced
Add the carrots, celery, and ham.
2 stalks celery, sliced, 2 large carrots, peeled and chopped, 1 ham hock
Pour in 4 cups of chicken broth and 4 cups of water.
4 cups chicken broth, 4 cups water
Add in the rinsed and drained dried beans.
20 ounces dried beans
Add in the Cajun Seasoning, Italian Seasoning, and salt (if desired) and pepper.
2 tablespoons Cajun Seasoning, 2 teaspoons Italian Seasoning, 1/2 tsp each salt and pepper
Place the lid on top of the Instant Pot and move the pressure release valve to the SEALING position. Pressure cook 45 minutes on High Pressure by pressing the MANUAL or PRESSURE COOK button. Adjust the timer to 45 minutes. Make sure it says High Pressure. (NOTE: It will take 10 to 20 minutes to come up to pressure before it starts the 45-minutes of pressure cooking.)
Do a natural release, which means that you do NOTHING and let the Instant Pot release pressure naturally until the pin drops.
After the Instant Pot has fully released the pressure, and the pin has dropped, open the lid and pour in can of diced tomatoes with the juice. Press Sauté to heat for 5 minutes. Garnish with chopped cilantro or parsley and serve.
14.5 ounce can diced tomatoes