Toss shrimp with lime juice in medium bowl and marinate about 15 minutes. Remove shrimp and discard marinade.
Heat olive oil in large skillet over medium-high heat and cook shrimp about 3 minutes or until pink, stirring occasionally. Remove and keep warm.
Add zucchini and onion into same skillet and cook about 5 minutes or until onion is tender, stirring occasionally. Add garlic and cook 30 seconds. Add tomatoes and cook 1 minute. Stir in water and Knorr® Reduced Sodium Chicken flavor Bouillon Cube. Simmer about 5 minutes, stirring occasionally. Return shrimp to skillet. Stir in cilantro and simmer an additional 2 minutes. Sprinkle with avocado. .
Serve, if desired, over hot cooked rice and season with hot pepper sauce.