Bardos. There shouldn't be a problem with the nuts, boiled eggs and spoon but the canned sardines will be a problem if listed over 100 ml. Be sure not to bring metal knife and fork as they will be taken off you. The other thing is be prepared to not be allowed to eat the nuts you bring with you as sometimes crew are asked to make announcements for people to not eat nuts on board due to a passenger having severe reactions to them leading to anaphylactic shock - not a pretty sight believe me.
That said - as in the above post - you can order diabetic meals from your airline by ringing them 48 hours in advance normally. DBML is the usual code for such a request.