I'm not very enthusiastic about homemade lunches during the week. If you have similar feelings, Trader Joe's premade salads will be perfect for you.
The Mexicali salad has chicken, peppers, corn, and sun-dried tomatoes, and it's light, so you won't feel stuffed afterward.
The jalapeño-Caesar dressing is delicious, but I typically skip it and use minced garlic and seasoning instead.