Step 1

Preheat an outdoor grill to high heat for 10 minutes and lightly oil the grate.

Step 2

Meanwhile peel back corn husks carefully, leaving them attached at the bottom. Drizzle oil over kernels and liberally sprinkle with 2 teaspoons Greek seasoning. Bring husks back up over corn.

Step 3

Grill corn, turning often, about 10 minutes. Add zucchini, bell pepper, and jalapeno to the grill and cook, turning often, to allow grill marks to form on all sides, until vegetables are tender. Carefully peel down corn husks and allow corn to slightly char, developing grill marks. Remove from grill and allow to cool.

Step 4

Remove and discard husks and cut kernels off corn cob. Cut zucchini and bell pepper into bite-sized pieces. Mince jalapeno.

Step 5

Combine corn, zucchini, jalapeno, bell pepper, cilantro, lime juice, remaining 1 teaspoon Greek seasoning, 2 tablespoons olive oil, and salt in a large bowl. Stir in avocado just before serving.