Cook orzo according to package directions. Drain and set aside.
In a large pot, heat oil over medium heat. Add shallot; cook 2 min. Add garlic; cook 1–2 min more. Add broth, bring to a boil, then lower to a simmer.
In a bowl, whisk eggs and lemon juice. Slowly pour in ½ cup hot broth while whisking. Repeat with another ½ cup until smooth.
Slowly whisk egg mixture into pot over medium-low heat. Add chicken, cooked orzo, and dill. Simmer gently 2–3 min until warmed through. Season with salt & pepper to taste.
