Cut the bagel in half horizontally to get two halves.
Place the tomato slices on one of the bagel halves.
Sprinkle the crumbled feta cheese over the tomato.
Add the cilantro leaves on top of the feta.
Drizzle the yogurt sauce over the cilantro leaves.
Top with the other bagel half.
Your tomato, feta, and cilantro salad bagel with yogurt sauce is ready to enjoy!