Creamy Shrimp Asparagus 'Risotto'

2 Tbsp. margarine, divided
1 lb. uncooked large shrimp
1 small onion, chopped
2 cups water
1 package Knorr® Rice Sides™ - Herb & Butter
1 box (7.5 oz.) frozen asparagus spears, thawed or fresh asparagus*, cut into 1-1/2-inch pieces
1/4 cup half & half
1/4 cup grated Parmesan cheese

1 Melt 1 Tbsp. margarine in large nonstick skillet over medium high heat and cook shrimp, stirring occasionally, until shrimp turn pink, about 4 minutes. Remove shrimp and set aside.
2 Melt remaining 1 Tbsp. margarine in same skillet and cook onion over medium heat, stirring occasionally, until onion is tender, about 4 minutes.
3 Stir in water and Knorr® Rice Sides™ - Herb & Butter. Bring to a boil over high heat. Reduce heat to low and simmer covered 5 minutes. Stir in asparagus and simmer until rice is tender, about 2 minutes. Stir in shrimp. Remove from heat and stir in half and half and cheese.