Shred your red and purple cabbage by hand using a sharp chef's knife. Work in the direction of the natural grain rather than against it—I learned this the hard way after bruising entire heads of cabbage. This creates longer strands that hold together beautifully when you toss the finished beautiful summer rainbow slaw recipe.

Slice your three bell peppers into thin matchsticks, removing all seeds and white pith completely. Marco always asks why I'm this meticulous about pith removal, and it's because those white bits turn bitter after sitting in the dressing for hours. You want clean flavor, not hidden harshness creeping in later.

Shred your carrots on a box grater using the medium holes, not the finest setting. The medium texture holds its slight crunch after the lemon juice works into it over several hours. Thinner shreds turn rubbery by hour three—I speak from experience here.

Whisk together your lemon juice, honey, olive oil, and Dijon mustard in a small bowl for exactly one minute. The mustard emulsifies the dressing so it coats vegetables rather than sliding to the bottom. This is why skipping the mustard creates inferior slaw—the acid and oil separate every single time without it.

Combine all your shredded vegetables in a large serving bowl and toss gently with your hands for two full minutes. I use my fingers rather than utensils because it distributes vegetables more evenly without crushing them. Your hands let you feel when everything's mixed through.

Pour your prepared dressing over the vegetables and toss again for three minutes until every strand glistens. Some dressing will seem to disappear into the vegetables—that's perfect. It means they're absorbing flavor rather than it pooling at the bottom.

Let your beautiful summer rainbow slaw recipe sit for at least fifteen minutes before serving, though two hours is ideal. The vegetables will release moisture and absorb the dressing, creating layers of flavor that taste completely different from the moment you finish tossing. Patience here makes all the difference.

Just before serving, sprinkle your crumbled feta cheese and fresh parsley across the top. I wait until the last moment because cheese absorbs liquid and parsley loses its brightness if it sits in the dressing too long.