Bring 3 cups of water to a boil. Salt the water (if desired) and add rice. Bring back to a boil, cover, reduce heat to simmer and cook for 60 to 65 minutes. When the water is absorbed, remove from heat and let cool.
Meanwhile, make the dressing by whisking together olive oil, lemon juice, garlic, salt and pepper. When the rice is cool, toss with dressing.
Remove tough stems and ribs from greens and chiffonade. Combine with peppers, fennel and green onion. Just before serving, toss veggies with dressed rice.