Remove the turkey from the packaging. Place on a baking dish.
Combine all the seasonings together in a bowl. Pat the turkey breast dry and rub the seasoning mixture all over the turkey breast.
Place into your fridge, uncovered for at least 2 days, 4 days would be even better.
Add the onion, garlic, and 1 cup of water to your Instant Pot. Place the trivet into the pot.
Remove the turkey breast from the fridge and place it into the Instant Pot on the trivet or silicone sling.
Set to high pressure for 35 minutes. Set to sealing.
Allow for natural release. It should take about 15 minutes.
With a thermometer make sure the turkey is at least 165 degrees. Remove the turkey from the Instant Pot and place it onto a sheet pan.
Turn on the broiler of your oven. Place the turkey inside so that it doesn't touch the heating element.
Cook until the skin is brown and crispy, rotating the pan to brown evenly. Don't not leave the area while doing this.
Allow 20 minutes for the turkey breast to rest before carving.