Tropical Fruit, Avocado, and Grilled Shrimp Salad

red onion, thinly sliced

coarse salt

pineapple, diced

ripe papayas, diced

ripe mango, diced

roasted red bell pepper, cut into strips

roasted yellow bell pepper, cut into strips

poblano chiles, cut into 1/4-inch strips

jalapeño peppers, minced

chopped fresh cilantro

extra-virgin olive oil

sherry wine vinegar

large shrimp, peeled and deveined

ripe avocados, cut into wedges

Freshly ground black pepper