Stunning blue and green color block art pottery platter, signed

This beautiful platter measures roughly 15- 1/2 inches across. It has a wavy edge and undulates up and down. The center part of the platter not including the rim is 12 inches across. One and a half inches tall the signature on the bottom appears to be JP or GP but I cannot determine the full name. It was acquired at an estate sale with other stunning mid-century items. It does not appear to have been used for serving, there is no cutlery damage. I do not see cracks or chips anywhere on the platter. There are some inconsistency in the glaze, but that is part of the handmade beauty. A beautiful item to simply display or to add to your servingware collection. The platter is slightly uneven on the bottom, but it does not wobble when sat on a table. Again, part of the handmade beauty. Possibly Joan Pevarnik from Arizona. Platter only, other items are listed separately. EE3pr2500