Prepare the ingredients: Chop vegetables, cook your chicken (or use pre-cooked), and let everything cool completely.
Make the dressing: Add olive oil, lemon juice, mustard, garlic, salt, and pepper to a small jar. Shake well until combined.
Assemble the bowls: Divide greens among 3–4 containers. Add chicken, tomatoes, cucumbers, carrots, and corn in separate sections to keep the greens crisp.
Add extras: Spoon quinoa into each bowl if using.
Store the dressing: Keep dressing in a separate container until ready to eat.
Serve: When ready, drizzle the dressing over the salad, toss, and enjoy.