Storage & ReheatingThis will keep in the fridge for up to 4 days in an airtight container. The basil pesto can lose some of its vibrant green colour over a few days, which is normal and doesn't affect the flavour. Not recommended for freezing once fully assembled, as the pasta's texture suffers — though the pesto on its own freezes well for up to 3 months if you want to make a batch ahead. Reheat gently in the microwave or a pan with a splash of water or extra olive oil to loosen everything back up.