Why This Recipe Works

Double-duty marinade: The same mixture that tenderizes the chicken doubles as the dressing, saving time and dishes.
Quinoa tricks: Toasting the grains before cooking brings out nutty flavor; fluffing with a fork while warm prevents clumps.
Built-in crunch longevity: Celery and scallions stay crisp for five days, unlike softer herbs that wilt.
Feta timing: Adding cheese only to the portions you’ll eat within 48 hours keeps it from getting rubbery.
Portion-smart storage: Divide into wide-mouth jars; shake and eat straight from the container—no sad, soggy boxed salad.
Macro-balanced: 32 g protein, complex carbs, and heart-healthy olive oil keep energy steady through 3 p.m. slumps.

Ingredients You'll Need

Great meal prep starts with ingredients that taste vibrant on day one and day five. Below are the brands and shopping pointers I’ve settled on after a decade of weekly batches.

For the Lemon-Oregano Chicken

1¼ lb (570 g) boneless skinless chicken thighs – Thighs stay succulent after refrigeration; if you prefer breast, brine it first (¼ cup kosher salt per quart water, 30 min).
¼ cup extra-virgin olive oil – Look for a harvest date within 18 months; I reach for California Arbequina for its buttery notes.
2 Tbsp freshly squeezed lemon juice – Bottle juice tastes flat; zest the lemon first for even more punch.
2 cloves garlic, grated – A Microplane turns garlic into paste that distributes evenly.
1 tsp dried oregano – Greek mountain oregano is more floral; crush between palms to awaken oils.
¾ tsp kosher salt & ½ tsp black pepper

For the Quinoa

1 cup dry quinoa – White quinoa cooks fastest; tri-color adds visual pop but needs an extra 2 min.
1¾ cups low-sodium chicken broth – Swanson or homemade; water works but broth builds flavor.
½ tsp kosher salt

Salad Mix-ins

1 cup English cucumber, diced ¼-inch – Leave skin on for color; seeds stay small so no need to scoop.
¾ cup cherry tomatoes, halved – Opt for Campari for sweetness out of season.
½ cup Kalamata olives, quartered – Buy pitted in brine; rinse to reduce sodium.
⅓ cup crumbled feta, divided – Sheep’s-milk feta (Greek) is creamier; store remainder in lightly salted water.
⅓ cup sliced scallions – Green parts only stay perky; save whites for omelets.
⅓ cup diced celery – Adds crunch without overpowering; slice ⅛-inch so it disperses.

Lemon-Oregano Dressing (shares marinade)

3 Tbsp red-wine vinegar – Authentic Greek tang; substitute champagne vinegar for milder flavor.
1 tsp Dijon mustard – Acts as emulsifier so oil and lemon don’t separate.
1 tsp honey – Balances acidity; agave works for vegans.
⅓ cup olive oil – Same quality oil as marinade keeps flavors harmonious.

How to Make Meal Prep Chicken and Quinoa Salad with Feta and Olives

Step 1

Marinate the Chicken

Whisk olive oil, lemon juice, garlic, oregano, salt, and pepper in a medium bowl. Reserve 3 tablespoons for later dressing. Add chicken, turning to coat. Cover and refrigerate 30 minutes (or up to 24 hours for deeper flavor). The acid tenderizes without turning meat mushy because we’re using a modest amount of lemon and shorter window.

Step 2

Toast & Cook Quinoa

Place quinoa in a fine-mesh strainer; rinse under cold water 30 seconds to remove bitter saponins. In a small saucepan over medium heat, add quinoa and stir 2 minutes until grains smell nutty. Pour in broth and salt; bring to boil. Reduce to low, cover, and simmer 15 minutes. Remove from heat; let stand 5 minutes, then fluff with fork and spread on a sheet pan to cool quickly (prevents clumping and keeps grains distinct).

Step 3

Grill or Sear Chicken

Heat outdoor grill or grill pan to medium-high (oil grates). Remove chicken from marinade, letting excess drip off; discard remaining liquid in bag. Grill 4–5 minutes per side until internal temp reaches 165 °F/74 °C. Transfer to plate, tent loosely with foil, and rest 5 minutes so juices redistribute. Dice into ½-inch pieces once cool enough to handle.

Step 4

Assemble the Dressing

To the reserved 3 Tbsp marinade, whisk in vinegar, Dijon, and honey. While whisking constantly, drizzle in ⅓ cup olive oil until emulsified. Taste; adjust salt or honey to balance. This dual-use trick saves dishes and marries every component under one bright, herby profile.

Step 5

Combine Salad Components

In your largest bowl, add cooled quinoa, cucumber, tomatoes, olives, scallions, and celery. Pour dressing over top and fold gently with a silicone spatula. Add chicken and half the feta; fold again. Top with remaining feta only on portions you’ll eat within 48 hours for optimum texture.

Step 6

Portion for Meal Prep

Spoon salad into five 2-cup glass jars or containers. Press down lightly to compact, place a paper towel on surface to absorb moisture, and seal. Refrigerate up to 5 days. When ready to eat, shake jar or give a quick stir; flavors deepen each day.

Expert Tips

Don’t Skip the Rest

Resting chicken post-grill is non-negotiable. Cutting too soon spills juices everywhere, yielding dry meat that tastes reheated even on day one.

Batch-Cook Extra Quinoa

Make a double batch of quinoa and freeze flat in zip bags. Break off what you need for future salads—saves 20 minutes next prep day.

Flash-Cool Grains

Spread hot quinoa on a rimmed sheet pan, set in freezer 5 minutes, then transfer to fridge. Rapid cooling keeps grains fluffy and food-safe.

Keep Feta Separate

Store extra feta submerged in lightly salted water in a sealed container; it stays creamy for weeks and won’t pick up fridge odors.

Revive with Citrus

By day four, a quick squeeze of lemon wakes everything up. Keep a wedge tucked into each jar for on-the-go freshness.

Macro Math

Weigh your final batch, divide by five, and log one portion in your fitness app once; you’ll have accurate data all week.

Variations to Try

Mediterranean Vegan: Swap chicken for a can of chickpeas roasted 15 min at 425 °F and use maple syrup instead of honey.
Low-FODMAP: Omit garlic and scallions; use garlic-infused oil and chopped cucumber only.
California Twist: Sub avocado oil, add diced avocado just before eating, and swap feta for crumbled goat cheese.
Spicy Greek: Stir ½ tsp Aleppo pepper into dressing and add a handful of sliced pepperoncini.
Harvest Edition: Fold in roasted butternut squash cubes and dried cranberries for fall flair.

Storage Tips

Refrigerator: Store jars toward the front of the top shelf (warmest zone) to prevent accidental freezing near the back. Consume within 5 days for best texture; flavor is still excellent on day 6, but cucumber may soften.

Freezer: Quinoa and chicken freeze well, but tomatoes and cucumber do not. If you plan to freeze, prep base of quinoa + chicken + dressing only; add fresh vegetables upon thawing.

Reheating: This salad is designed to be enjoyed cold. If you prefer warm quinoa, microwave individual portions 30 seconds, then stir in cold vegetables for textural contrast.