1. Start to cook pasta according to package directions.
2. Meanwhile, sprinkle shrimp with 1/4 teaspoon of the salt. Heat 1 tablespoon of the oil in a large non-stick skillet over high heat; add shrimp and cook 1-12 minutes per side, until golden. Add garlic and cook 30 seconds. Transfer to a plate.
3. Heat remaining 1 teaspoon oil in same skillet. Add snow peas; sprinkle with remaining 1/4 teaspoon salt and cook, stirring occasionally, 3 to 4 minutes (4 to 5 minutes for sugar snap peas), until lightly charred in spots and tender-crisp.
4. Remove 1/3 cup pasta cooking water to a cup. Drain pasta and add to peas in skillet with pasta water, lime juice, pad thai sauce and shrimp. Cook mixture, stirring, 3 to 4 minutes, until heated through. Transfer to a serving bowl and sprinkle with green onions. Serve immediately. Makes 4 servings.