Cannelini beans with fried chorizo, red onion, tomatoes, parsley, balsamic vinegar and olive oil? Lovely with raw garlic if you don't mind gassing your colleagues.
Frittata? I like mine with feta and courgettes. And parmesan. But any veg will do.
Wholemeal pita bread with falafel, humous, salad, feta, avocado, chilli sauce? Assemble just before you eat or the humous will make the bread go soggy.
Humous with crudités - carrots, peppers, cucumber, sugar snap peas. Add olives, capers, feta and /or sundried tomatoes for variety.
Ham and cheese rolls: to cream cheese add some chopped parsley, chopped walnuts, and grated lemon zest. Spread in a thick line along one side of a nice slice of ham. Roll up into a cigar shape.
Smoked salmon rolls: as above but with mashed avocado instead of walnuts
Stuffed chicken breast (prepared the night before, cooled and sliced into a salad): try feta and sunblush tomatoes, or sage and walnut pesto (you need to make this yourself with lots of lemon juice and parmesan).
Pear, walnut and blue cheese salad.
Green salad of watercress, fennel, apple, a few grapes, celery. Good for accompanying things like the stuffed chicken breast or whatever you have left over from the night before.
Smoked mackerel with brown bread, cream cheese and watercress. Or just as a salad flaked onto watercress.
Spinach salad with bacon, blue cheese or cheddar, tomatoes and finely sliced red onion.
Lentils with veg: lovely with roast beetroot and carrots cut into largish chunks, and feta. Have with rocket or watercress.
Wild rice salad: leftover shredded roast chicken, avocado, watercress, dried cranberries, goats cheese.
Hope some of these sound interesting.