Fast carbs (e.g. refined sugars from fruit, sweets etc) are the worst
Careful of the sugar content in fruit, if you’re diabetic. That can sneak in. Crackers are starchy as well, and they won’t give you the nutrients that you need. Things like meat, mushrooms, vegetables and others are good ideas - but it would be a good idea to discuss it with a dietitian. I may be good at medical science but I wouldn’t claim to know too much nutrition-wise, and I could be missing some vital nutrients somewhere (and ofc, leaning more towards vegetables etc rather than meat if you can help it can’t hurt, given saturated fats etc)