how long can tomato paste be refrigerated
Unopened canned tomatoes should be used within six months. Once opened, store canned tomatoes in a covered glass container in the refrigerator up to one week. Leftover tomato paste and sauce can be frozen for up to two months. Freeze one tablespoon of tomato paste in each section of an ice tray, pop out when frozen, and seal in an airtight baggie for quick, pre-measured additions to soups and sauces. They need not be thawed prior to adding to your recipes in most cases.