@Chet31 This chapter is split into three parts which is why it ends so suddenly. Chapter 16 is also the same way. Seems strange if this is how it is actually published in Japan.
They could have added the jam into the sauce. Some dark berry jam (Blueberry or cranberry), around 1/2 - 1 tea spoon full. Maybe they did that, because the sauce had a light sourness to it.
That second-to-last panel on page 8. The correct and natural order of the world.
When a glimpse the future you'd want to have is already right in front of your eyes.
If you get a "random idea", make a small portion of it, and taste it, so you don't ruin the whole dish if it fails, and if it's succesful/tasty, you can make it like that next time.