1 pound (21-25 count) shrimp, peeled, d-veined, tails on
1 cup thinly sliced red bell pepper
2 tablespoons olive oil
2 cloves garlic, chopped
1/2 teaspoon crushed red pepper flakes
1/4 teaspoon coarsely ground black pepper
1/4 teaspoon salt
Sliced scallion for garnish