How to Make It
Heat butter in a large skillet over medium-high heat; swirl until foamy. Add carrots; sauté 1 minute. Add chicken stock and 1/2 teaspoon salt; simmer 4 minutes. Add asparagus, peas, and 1 teaspoon lemon rind; simmer 3 minutes or until liquid is reduced to 1/2 cup and vegetables are crisp-tender. Reduce heat to medium-low. Add remaining 1/4 teaspoon salt, cream cheese, and pepper to vegetable mixture, stirring with a whisk until smooth.
Cook pasta according to package directions, omitting salt and fat. Drain in a colander over a bowl, reserving 1/2 cup pasta cooking liquid.
Add noodles to vegetable mixture; toss to coat. Stir in 1/4 cup cooking liquid; add additional cooking liquid as needed to thin sauce. Sprinkle remaining 1 teaspoon rind and dill over pasta mixture. Divide pasta mixture into 4 shallow bowls. Serve immediately.