Step 1

Combine milk and garlic in a medium saucepan. Bring to a simmer over medium heat and cook, stirring occasionally, until reduced to 1 1/4 cups, about 10 minutes. Remove from heat; process with an immersion blender (or a high-powered blender) until smooth, about 1 minute. (Use caution when pureeing hot liquids.) Stir in Parmesan, cream cheese and lemon zest until smooth and melted. Cover to keep warm.

Step 2

Meanwhile, cook pasta according to package directions. Drain, reserving 1/2 cup cooking water. Rinse with warm water.

Step 3

Heat oil in a large nonstick skillet over medium-high heat. Add shrimp and cook, stirring often, until opaque, about 3 minutes. Add the Parmesan sauce, pasta and peas; toss to coat. Add the reserved pasta water, 1 tablespoon at a time, until desired consistency is reached. Divide among 4 bowls and sprinkle with parsley. Serve with lemon wedges.