Rinse and cook your brown rice or quinoa according to the package directions.
Allow your cooked rice to cool down to room temperature.
In a large bowl, combine your prepared spinach, cucumber, tomatoes, red bell peppers, red onions, feta cheese, kalamata olives, and rice. Gently stir to combine well.
In a small bowl combine the olive oil, lemon juice, minced garlic, oregano, sea salt, and pepper. Whisk everything until emulsified.
Drizzle your dressing over the salad and toss to coat. Taste test and adjust as desired.
You can serve this chilled or enjoy it right away. Stays good in the fridge for 3-4 days.
Enjoy!