Firstly your experience is very good, and it must be very enriching. Do not undersell yourself, you can give a very positive spin on your indie experience. You can cite this as your entrepreneurial foray.
Secondly, why not try for few interviews at good companies, and see how you like the feel - You might like it - If it does not work out well, you can always go back.
I don't understand the lofty valuation of these food startups - Most of them are running huge losses, their customer acquisition/marketing cost is so high - Look at Blue Apron.
You can get ANY salary increase % depending on the following:
- You should do very well in the interview
- It should be dependent on how much they need your skills
- It should be dependent on how much they can pay for a role like yours, or one notch above [Please take Glassdoor data with a pinch of salt - some of the data is averaged out, or outdated]