This is one of those meals that can be created with whatever is in the fridge. Call it a 'Clean the Fridge Out' meal. You can use leftovers, meat, roasted veggies, leftover rice etc, or you can start fresh. You will really taste and season as you go. I wanted a warm, almost Indian feel to the filling, so I used the curry and cumin. I could have also added 1/4 tsp coriander, 1/4 tsp cinnamon etc.
This is easily adjusted up or down for the amount of people you are feeding. And whether it will be a main or a side. If it is going to be a side, really only use the smallest squashes available, because with the filling, it can be deceptively rich even though it doesn't look like a lot of food.
These can be prepared in advance, and warmed before serving.
Any leftover filling would work well warmed up the next day with a fried egg on top!