Classic Pasta Salad for a Crowd (Feeds 24!)
Classic pasta salad is one of those dishes that shows up at nearly every potluck, barbecue, and family gathering — and for good reason. This version is made with tri-color rotini, loaded with salami, mozzarella, cherry tomatoes, olives, and red onion, and coated in a homemade Italian dressing that’s far better than anything from a bottle. Best of all, this recipe is scaled to actually feed a crowd, making it a reliable go-to whenever you’re cooking for a large group.
What makes this pasta salad a favorite isn’t just the classic flavor combination — it’s also how well it holds up. Made ahead of time and chilled, it only gets better as the flavors meld together, which makes it one of the easiest dishes to prep in advance for a big event. Below you’ll find the full step-by-step process, along with tips for scaling it up or down and keeping leftovers fresh.
Ingredients (Feeds a Crowd — About 24 Servings)
- 1 lb tri-color rotini pasta
- 8 oz salami, diced
- 8 oz mozzarella cheese, cubed
- 2 cups cherry tomatoes, halved
- 1 cup black olives, sliced
- 1/2 cup red onion, diced
- 1 cup olive oil
- 1/3 cup red wine vinegar
- 2 tbsp Italian seasoning
- 2 cloves garlic, minced
- 2 tbsp grated parmesan, for topping
- 1/4 cup fresh basil, chopped, for topping
- Salt and pepper to taste
Step-by-Step Instructions
Cook the Pasta
Bring a large pot of well-salted water to a boil and cook the tri-color rotini until al dente, following the package directions. Drain well in a colander and rinse briefly under cold water to stop the cooking process and cool the pasta down so it’s ready to mix with the other ingredients without wilting them.
Prep the Vegetables and Add-Ins
While the pasta cooks, dice the salami and mozzarella into bite-sized cubes, halve the cherry tomatoes, slice the black olives, and dice the red onion. Having everything prepped and ready to go before you start mixing makes assembling the salad quick and easy, especially when you’re making a big batch for a crowd.
Whisk the Dressing
In a jar or bowl, combine the olive oil, red wine vinegar, Italian seasoning, garlic, salt, and pepper. Whisk vigorously, or seal the jar and shake well, until the dressing is fully emulsified. Making your own dressing instead of using a bottled version gives you control over the flavor and keeps the salad tasting fresh rather than overly processed.
Combine Everything in a Large Bowl
In your largest mixing bowl, combine the cooled pasta with the salami, mozzarella, cherry tomatoes, olives, and red onion. Because this recipe feeds a crowd, you’ll want a bowl with plenty of room to toss everything without spilling over the sides.
Toss with the Dressing
Pour the dressing over the pasta salad and toss thoroughly, making sure every piece gets coated evenly. It helps to toss in batches or use tongs to really work the dressing through the salad, since a large volume of pasta can be tricky to coat evenly all at once.
Chill and Serve
Cover and refrigerate the salad for at least an hour before serving to let the flavors meld together. Right before serving, give it one more toss, top with fresh basil and a sprinkle of grated parmesan, and it’s ready for the table.
Tips for the Best Crowd-Sized Pasta Salad
Because this recipe makes such a large batch, a few small habits make a big difference. Cook the pasta in batches if your pot isn’t large enough to hold it comfortably, since overcrowded pasta water leads to gummy, unevenly cooked noodles. Rinsing the pasta under cold water after draining is especially important at this scale, since it stops the residual heat from continuing to soften the noodles while you prep the rest of the ingredients.
When it comes to the dressing, don’t be tempted to skimp — a larger batch of pasta salad needs a proportionally larger amount of dressing to coat everything evenly, and it’s easy to underestimate how much you’ll need. If the salad looks a little dry after tossing, whisk together a small extra batch of dressing rather than trying to stretch what you have.
Finally, use your biggest mixing bowl, or split the salad between two bowls if needed. Trying to toss a large batch in a bowl that’s too small usually means ingredients end up unevenly distributed, with some bites loaded with vegetables and others mostly plain pasta.
Frequently Asked Questions
How far ahead can I make this pasta salad?
This salad can be made up to 2 days ahead of time. In fact, letting it sit overnight in the fridge often improves the flavor, since the pasta has more time to soak up the dressing. Just give it a fresh toss and add the basil and parmesan right before serving.
Can I make this recipe for a smaller group?
Yes — simply halve or quarter all the ingredient amounts. The recipe scales down easily since it’s just a matter of proportionally reducing everything.
What’s the best way to store leftovers?
Store leftovers in an airtight container in the fridge for up to 4 days. The pasta will continue to absorb dressing over time, so you may want to drizzle in a little extra olive oil or vinegar before serving leftovers to freshen it back up.
Can I swap any of the ingredients?
Absolutely. Pepperoni works well in place of salami, feta or provolone can replace the mozzarella, and any color bell pepper adds a nice crunch if you want to bulk up the vegetables further.
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