I had a salad yesterday with salmon.
Piece of salmon in foil with salt and pepper - 20 mins in the oven. Instead of salad you could do new potatoes and 'summer' veg such as mangetout and baby corn.
A snacky/supper dish I do is smoked fish and rice cooked in a 50/50 mix of orange juice and water, you could add a salad as a side to balance it a bit more.
Another snack on
pita bread with lettuce, bacon and creme fresh.
Stick a joint of lamb or beef in a slow cooker, serve with pitta or crusty bread with veg or salad for people to make their own sandwiches.
A vegi bake (with sausages or chicken if you want meat) would work well.
Chopp up onions, peppers, potatoes, courgette - basically anything in the fridge.
Season, drizzle with oil and stick in the oven.