Shred the cabbage finely.
Julienne the carrot thinly.
Sprinkle a little salt over the cabbage and carrot, and let them sit for 5 minutes.
Squeeze out the excess moisture from the pickled vegetables.
Mix plain yogurt, lemon juice, and pepper to make the dressing.
Toss the vegetables with the dressing.
Place the salad on whole wheat bread and cover with another slice to make a sandwich.