Turn Instant Pot to Saute and wait until it gets hot. Add Butter and Garlic
Add Cubed Chicken and Saute until no longer pink
Add cubed ham and dry mustard
Add Water and pasta.
Set to Manual for 6 minutes. Quick Release and then stir pasta.
Add 8 oz Evaporated Milk and Dijon Mustard
Add Parmesan Cheese and Swiss Cheese and Stir.
Allow to cool for 10+ minutes stirring occasionally. Sauce will thicken as it cools