Joan, I think you have a perfectly valid interpretation. However, I wondered why the rocks were in the picture and speculated they might symbolize a shattered Easter tomb. I thought the Jesus on the cross looked remarkably healthy despite bleeding into the cup, so perhaps time is altered in this moment that is portrayed, with both death and resurrection now concurrent, ever-present, happening in an eternal and dimensionless moment. Per Hebrews -- Jesus is the 'one and only' sacrifice, so each Mass is not an individual sacrifice but a microcosm?? of this one event that extends forward (and backwards) in time indefinitely, but is also outside of time?? You could interpret the image as Jesus is the High Priest and a Mary receives the gifts. (Did you notice the loaf perched on her arm?) I suppose there are other images in the Missal. I wish I could view them.