Rinse the quinoa in a fine mesh strainer, until water runs clear. Place in a saucepan with the water.
Bring quinoa to a boil on high heat. Then lower heat to medium low and cook for 15 minutes with lid on.
When time is up, remove from heat and let sit for 5 minutes. Keep lid on.
Meanwhile, prepare all the other ingredients.
When the quinoa is finished, add the lemon juice, salt, and pepper, and fluff up with a fork.
Add quinoa to a bowl. Add in the tomatoes, cucumber, parsley, onion, and feta.
Drizzle with olive oil and sprinkle with paprika, and mix together well.