Cook barley per package directions and allow to cool. (See Note 1)
Whisk together the salad dressing and set aside.
In a large salad bowl mix together the barley, pineapple, bell peppers, almonds, cilantro and salad dressing. Toss to coat and allow dressing to absorb with barley. Cover and refrigerate while you cook shrimp.
Season shrimp with salt and pepper. In a large skillet over high heat add oil. Quickly sauté shrimp, cooking for 1 to 2 minutes per side depending on size, or until golden and crisp on edges. Remove from pan and add to salad. Toss to coat and serve immediately or chill completely prior to eating.
Notes
Bring 1 cup pearled barley, pinch of salt and 2 1/2 cups water to a boil. Reduce heat to a simmer; cook, covered, until tender and most of the liquid has been absorbed, 25-30 minutes. Let stand 5 minutes. Drain in sieve in needed. Makes 3-3 1/2 cups.