01 - Rinse rice under cold running water until the runoff turns clear. Transfer to a medium saucepan with 2 cups water and 1/2 teaspoon salt. Bring to a rolling boil over medium-high heat, then reduce to low, cover tightly, and simmer for 15 to 18 minutes for white rice or 35 to 40 minutes for brown rice until all liquid is absorbed and grains are tender. Remove from heat, fluff gently with a fork, and let rest covered.
02 - In a small mixing bowl, combine the olive oil, fresh lemon juice, minced garlic, dried oregano, 1/2 teaspoon salt, and black pepper. Whisk vigorously until the dressing emulsifies and appears slightly creamy. Set aside.
03 - Halve the cherry tomatoes, dice the English cucumber into quarter-inch pieces, chop the red bell pepper into bite-sized squares, slice the red onion paper-thin, and finely chop the fresh parsley. Drain and rinse the canned chickpeas under cold water. Pit and halve the Kalamata olives.
04 - Add the prepared tomatoes, cucumber, bell pepper, red onion, chickpeas, olives, and parsley to a large mixing bowl. Pour half of the dressing over the vegetables and toss thoroughly to coat every component evenly.
05 - Divide the cooked rice among four serving bowls, spreading it across the base. Mound the dressed vegetable mixture generously over each portion of rice. Scatter crumbled feta cheese over the top of each bowl.
06 - Drizzle the remaining dressing over each assembled bowl. Serve immediately at room temperature, or refrigerate for 20 to 30 minutes if you prefer a chilled bowl.