Bring a large pot of salted water to a boil and cook the rotini according to package directions—usually about 10 minutes. I always taste a noodle about a minute before the timer goes off because I like mine just barely al dente (not mushy). Drain it well and spread the warm pasta on a rimmed sheet pan to cool faster. This prevents it from turning into a clumpy mess.
While the pasta cooks, prep all your vegetables—halve the cherry tomatoes, dice the cucumber and peppers, and chop your fresh herbs. I usually line up all my bowls first so I'm not scrambling while the pasta's still cooking. Having everything ready means you'll actually finish this in 30 minutes instead of an hour.
Toss the cooled pasta with the extra-virgin olive oil and lemon juice in a large mixing bowl. Stir it really well so every piece gets coated—this is when it actually starts tasting good instead of bland. If you skip this step, trust me, the final salad won't have enough flavor to make you happy.
Add all your chopped vegetables, the feta cheese, olives, parsley, and dill to the pasta bowl. Use a gentle hand so you don't squish the feta cubes too much (though honestly if some crumbles happen, that's totally fine). This is also where you can taste and adjust—add more lemon juice or salt if it needs a little boost.
Toss everything together until it's really well combined and every piece of pasta is coated in that lemony dressing. The spring pasta salad recipe looks best when the colors are all mixed up and vibrant, so don't be shy with the tossing. Mine always sticks to the bottom of the bowl a tiny bit and that's actually fine—just scrape it all up.
Cover the bowl with plastic wrap and refrigerate for at least 30 minutes, or up to 24 hours if you're prepping ahead. The flavors get even better when they sit together, and the cold pasta dinner becomes way more refreshing. You can grab it straight from the fridge when you need it.
Give it one more toss before serving and check the seasoning—sometimes you need a pinch more salt or a squeeze of fresh lemon after it's been sitting. If it looks a little dry after overnight storage, drizzle another tablespoon of olive oil over the top. Serve it cold straight from the fridge and watch people go back for seconds.