Bach originally wrote his Two Part Inventions to both teach essential concepts of counterpoint and to foster basic keyboard technique.
Using the same idea, write a set of piano pieces that demonstrates your style, in particular (but not limited to) your approach to counterpoint. Come up with a framework to organize this set of pieces (for instance, Bach organized his Inventions in ascending key order).
Show off your idiomatic style with clarity and brevity. The music will no doubt be interesting to those listening, but you may reap the bonus of learning more about yourself in the process of distillation!