Hint to make 1 packet of oatmeal filling
Mix the packet with about 1/2 cup of water (maybe a little more) and nuke for 1 1/2-2 minutes. It will come out dry and puffed up. Add more water while stirring to reach consistency that you want. It has the texture of real oatmeal and doubles or triples in volume after extra water is added. I can't even finish a packet this way!