Every season is soup season. You just need to vary which ones you make. The Indian inspired lentil soup I posted here is perfect for summer. Light, spicy, fresh, etc. Just fits. In the fall I also do lentil soup, but go heavier and darker. Some brown fried smoked tofu (instead of bacon or such), apple vinegar, carrots, celery, bay leaf, etc.
And cooking with left overs is a joy to me. One of the great challenges that really gets your mind going. What can I do with what I have. Some of the best things are born from that. Especially a leftover casserole is usually amazing for me.
Even when you just have a leftover done meal like lasagne it can be awesome. Doing variations on finishing flavoring is an amazing learning experience.
With my ramen, which I am still eating at times since I froze half of the stock, I am constantly doing stuff. Finishing with white pepper one day and with tellicherry the other. Using different chilies and chili sauces. Adding coriander. Adding red wine vinegar. Especially cool was to compare adding sesame oil, olive oil, and butter. So much to try.
Leftovers are one of the absolute best ways to learn about flavors.