Lemony orzo pasta can be refrigerated for up to 3 days. Reheat: Pop it in the microwave for a minute or two. You can add a Tablespoon or more of milk to make it creamier, since the pasta tends to absorb moisture over time. Freezing: You can freeze this pasta, but it noodles can change texture when frozen and reheated. Once cooled, transfer to an airtight container and freeze for up to 3 months. Thaw completely before reheating.