The last time I went to Leiden, I had dinner at superb Dutch’s restaurant located in Noordwijk.
The place is very pretty, with a beautiful terrace overlooking the sea. I preferred the interior to admire the beauty of the place. The service was very friendly, and prices -of dishes was not too high.
I opted for the 5 courses menu (starter, 3 dishes of Dutch specialities and the desert) which cost us 65€ per person.
I found the wait between the different services long, but the quality of food was very good, which makes me forget this little detail.
I recommend that you visit it if you decide to visit this part of Holland.