Colorful Veggie Pasta Salad

Name: Colorful Veggie Pasta Salad
Ingredients: 1 pound fusilli; 2 ears corn, husked; 1 yellow squash, sliced lengthwise into 1/2-inch-thick planks; 1 zucchini, sliced lengthwise into 1/2-inch-thick planks; 1 orange bell pepper, cut into 1-inch strips; 4 scallions; 2 tablespoons extra-virgin olive oil, plus more for brushing; Salt and freshly cracked black pepper; 3 tablespoons store-bought pesto; Juice and zest of 1 lemon; 1 pint grape tomatoes, halved; 1/4 cup fresh parsley, chopped