Caporegime
I think I'm eating far too little.
A couple of slices of toast'n'jam in the morning 8am
a good cooked meal for lunch in work restaurant at 12pm
Exercise and lift weights after work 3 days a week
Have a good home made meal in the evening at 7pm
Possible have a light snack before bed.
Will I ever put on weight with this schedule or should I think about eating sandwiches in between meals?
If you're serious about putting on muscle then I would recommend caculating your calories/macros. Diet is extrememly important in terms of progression - without a solid diet you won't get anywhere. Do you have control over the food you eat i.e. do the shopping/prepare the food?