Energy storing solar stoves

The problem with using solar energy for cooking is that solar stoves work best when sun is at the peak. It is not possibe to use it indoors. Many 'Varsities took some initiative on this. Here are 10 potential solutions from engineers:
https://www.engineeringforchange.org/news/2012/02/04/ten_solar_cookers_that_work_at_night.html

In my opinion this is a great area where CEans with diverse knowledge can contribute. There are are enough agencies like DST with funds for such projects.
https://www.mnre.gov.in/st-thrust.htm