Step 1

Stir together the stock, quinoa, onions, garlic, chickpeas, 1 1/2 teaspoons of the olive oil, and 1/2 teaspoon of the salt in a 5- to 6-quart slow cooker. Cover and cook on LOW until the quinoa is tender and the stock is absorbed, 3 to 4 hours.

Step 2

Turn off the slow cooker. Fluff the quinoa mixture with a fork. Whisk together the lemon juice and remaining 2 tablespoons olive oil and 1/4 teaspoon salt. Add the olive oil mixture and red bell peppers to the slow cooker; toss gently to combine. Gently fold in the arugula. Cover and let stand until the arugula is slightly wilted, about 10 minutes. Sprinkle each serving evenly with the feta cheese, olives, and oregano.