Ingredients You'll Need

This salad is a celebration of winter produce at its peak. Each ingredient was chosen for both flavor and function—bright citrus to awaken the palate, hearty spinach for iron and fiber, walnuts for omega-3s, and a punchy vinaigrette that ties it all together without weighing you down.

Fresh baby spinach – Look for leaves that are deep green, crisp, and dry. Avoid any with yellowing or slimy spots. If you can, buy from the bulk bin so you can inspect every leaf; pre-washed bags are convenient but often contain more bruised pieces. Baby spinach is tender enough to eat raw yet sturdy enough to hold up under the citrus segments.

Navel or Cara Cara oranges – Navels are classic and reliable, but Cara Caras add a blush-pink hue and berry-like sweetness. Either way, pick fruit that feels heavy for its size and has smooth, thin skin—those are the juiciest. You’ll use both the segments and a bit of zest in the dressing.

Toasted walnuts – Buy halves and pieces, then toast them yourself. Raw walnuts taste flat and slightly bitter; ten minutes in a 350 °F oven transforms them into buttery, fragrant nuggets. If you’re nut-free, substitute toasted pumpkin seeds for crunch and a dose of zinc.

Red onion – A paper-thin slice adds bite and color. Soak the slivers in ice water for ten minutes if you find raw onion harsh; this tames the sulfur compounds while keeping the crunch.

Avocado – Optional but highly recommended for creaminess and healthy fats. Choose one that yields slightly to gentle pressure. Dice it just before serving to keep the color vibrant.

Feta or goat cheese – A crumble of salty cheese balances the sweet citrus. Vegans can swap in a sprinkle of nutritional yeast or a handful of briny kalamata olives.

Citrus vinaigrette base – Fresh-squeezed orange juice, a squeeze of lemon for brightness, Dijon mustard for emulsification, extra-virgin olive oil, and a drizzle of honey or maple syrup. The ratio is 3 parts oil to 2 parts citrus for a lighter, detox-friendly dressing that won’t leave you feeling weighed down.

Why This Recipe Works

Balanced macros: fiber-rich greens, healthy fats from walnuts and avocado, and vitamin-C-packed citrus keep you full without heaviness.
Make-ahead friendly: components can be prepped on Sunday and assembled in minutes for weekday lunches.
No refined sugar: the dressing is sweetened naturally with orange juice and a touch of honey or maple.
Texture contrast: crunchy walnuts, creamy avocado, juicy citrus, and tender spinach keep every bite interesting.
Seasonal flexibility: swap in blood oranges, mandarins, or grapefruit depending on what’s freshest at your market.
Quick cleanup: one bowl for dressing, one cutting board, and no cooking beyond toasting nuts.

How to Make Detox Citrus and Spinach Salad with Oranges and Toasted Walnuts

Toast the walnuts

Preheat oven to 350 °F (177 °C). Spread walnuts on a dry sheet pan and roast for 8–10 minutes, shaking once halfway, until fragrant and a shade darker. Cool completely; warm nuts will wilt the spinach.

Supreme the oranges

Slice off the top and bottom of each orange so it sits flat. Following the curve of the fruit, cut away peel and white pith. Over a bowl, slip a paring knife along each membrane to release neat segments; squeeze the remaining membrane to extract extra juice for the dressing.

Whisk the vinaigrette

In a small jar combine 3 Tbsp fresh orange juice, 1 Tbsp lemon juice, 1 tsp Dijon, 1 tsp honey, and a pinch of sea salt. Let stand 2 minutes so the salt dissolves, then add 5 Tbsp extra-virgin olive oil. Shake vigorously until creamy and emulsified. Taste and adjust sweet-tart balance with more citrus or honey.

Prep the greens

If your spinach isn’t pre-washed, rinse gently in a salad spinner, then spin dry. Water clinging to leaves will dilute the dressing. Tear any oversized leaves into bite-size pieces for easier fork-twirling.

Soften the onion

Thinly slice ¼ of a small red onion into half-moons. Submerge in ice water for 10 minutes, then blot dry. This quick bath removes harshness while keeping the pretty purple color.

Dice the avocado (if using)

Cut around the pit, twist halves apart, and tap the pit with your knife to lift it out. Score the flesh while still in the skin, then scoop out neat cubes with a spoon. Add avocado just before serving to prevent browning.

Assemble the salad

In a wide serving bowl layer spinach, orange segments, walnuts, onion, and avocado. Drizzle with half the dressing and toss gently with clean hands or tongs. Add more dressing a tablespoon at a time until leaves glisten; you may not need it all. Finish with a sprinkle of feta and freshly cracked black pepper.

Serve immediately

This salad is at its peak within 30 minutes of assembly—spinach stays crisp, avocado vibrant, and walnuts crunchy. If you must store leftovers, see the storage section below for best practices.

Expert Tips

Toast nuts low and slow

Walnuts burn quickly; 325 °F for 10–12 minutes yields even color without bitter edges.

Dry greens = dressing cling

Any residual water repels vinaigrette. Spin twice or roll in a clean kitchen towel.

Prep citrus the night before

Supremed segments keep 48 hrs chilled in their juice; pack in glass to avoid plastic aftertaste.

Chiffonade basil bonus

Stack, roll, and slice 4–5 fresh basil leaves; sprinkle on top for an aromatic lift.

Shake dressing in a jar

A small mason jar doubles as storage; emulsified vinaigrette stays stable for 3 days.

Chill your plates

Ten minutes in the freezer keeps delicate greens perky on hot days or outdoor buffets.

Variations to Try

Blood-Orange Beet: Swap in roasted golden beets and blood-orange segments for an earthy-sweet twist.
Protein boost: Top with a scoop of lemon-herb quinoa or a 6-minute jammy egg for extra staying power.
Citrus medley: Combine grapefruit, mandarin, and lime segments for a rainbow effect.
Nut-free crunch: Replace walnuts with roasted pumpkin seeds or sunflower seeds; still grain-free and school-safe.
Vegan feta: Use almond-based feta or a sprinkle of hemp hearts for cheesy flavor minus dairy.
Spicy kick: Add a pinch of Aleppo pepper or a few paper-thin jalapeño rings to the dressing.

Storage Tips

Fridge: Store undressed spinach, orange segments, and walnuts in separate airtight containers. Combine and dress just before eating. Greens keep 4 days, citrus 3 days, toasted nuts 1 week.

Dressed salad: If already dressed, eat within 4 hours. Leftovers can be transferred to a glass container lined with paper towel; cover tightly and refrigerate up to 24 hrs. Expect slight wilting but flavors stay bright.

Freezer: Do not freeze the finished salad. You can, however, freeze orange segments (spread on a tray, then bag) for smoothies; they’ll be too soft for salad once thawed.

Make-ahead lunches: Pack spinach, segments, nuts, and cheese in a tall 16-oz jar. Carry dressing in a 2-oz leak-proof container; combine at lunchtime and shake the jar to coat.