Easy Pasta Salad

Toss 1 medium red onion, thinly sliced, zest and juice of 1 lemon, 1 garlic clove, finely grated, 1 lb. summer squash and/or zucchini, halved lengthwise, thinly sliced crosswise, ½ cup coarsely chopped banana peppers, 3 Tbsp. red wine vinegar, 1¾ tsp. Diamond Crystal or 1¼ tsp. Morton kosher salt, and ¾ tsp. freshly ground black pepper in a large bowl to combine. Using your hands, gently massage vegetables to soften slightly. Let sit at room temperature, stirring occasionally, 25 minutes.

Cook 1 lb. orecchiette or other small pasta in a large pot of boiling heavily salted water, stirring occasionally, until al dente. Drain in a colander, shaking to remove excess water.

Add pasta, 2 pints cherry tomatoes, halved, 1 cup halved pitted Kalamata olives, ½ cup finely grated Parmesan, and ⅓ cup extra-virgin olive oil to vegetable mixture; toss well to combine. Add 8 oz. fresh mozzarella, torn into small pieces, 1 cup (packed) coarsely chopped basil, and ½ cup finely chopped oregano and toss gently just to incorporate. Taste pasta salad and season with more salt and pepper if needed.

Just before serving, top pasta salad with more Parmesan, basil, and oregano. Do ahead: Pasta salad (without toppings) can be made 5 hours ahead. Cover and chill.