Can you cure Plastisol ink in an oven?
Yes it will work. Put the shirt on a cookie sheet and place it in the oven at 450 degrees F (232 degrees C) for 2 minutes.
You will want to use an electric not gas oven, preferable one you do not cook food in as the ink does outgas a little.
The time is an estimate and some testing may be required depending on the thickness of the ink and garment type. It is always good practice to do a wash test after your first print of any job, to make sure that the cure is good.