Rinse quinoa under cold water.

In a pot, combine quinoa and water. Bring to a boil, then reduce heat and simmer for 15 minutes.

Fluff quinoa with a fork and let it cool.

In a large bowl, combine cooled quinoa, cherry tomatoes, cucumber, red onion, and parsley.

Drizzle with olive oil and lemon juice, then season with salt and pepper to taste.

Toss everything together until well combined.