Place the cottage cheese in a mixing bowl and season with pepper and mustard.
Divide cottage cheese mixture between 4 slices of bread and top with salad ingredients. Add the lettuce last.
Close the sandwiches with the remaining slices of bread and enjoy for lunch. If you are packing for a lunch box, wrap well with cling wrap or wax wrap to keep your sandwich fresh. Or pack the seasoned cottage cheese and salad ingredients separately and assemble just before eating.
Serve the same ingredients in a wholewheat wrap or roll.
Chickpea dip or guacamole is also delicious on this sandwich.
If you have any left-over veggies use this on the sandwich.