Nasturtium is only suitable for freezing to a limited extent because it quickly becomes mushy when thawed. However, if you want to use the flowers or leaves to flavor a stew or soup, you can definitely use frozen nasturtiums.
How to prepare nasturtium for freezing
Since you probably do not need large amounts of nasturtium for seasoning, you should also freeze them in small portions. This is very easy to do with the help of ice cube trays. Fill the cleaned and cut leaves into the ice cube trays, add some water if necessary and place the container in your freezer.
Once the cubes are frozen, transfer them to a larger freezer container. So you can always take small portions as needed. It is better to freeze flowers whole, if possible without damaging them. You can also use ice cube trays filled with water for this.
Here’s how you can use frozen nasturtium
Since the leaves and flowers of the frozen nasturtium become soft, mushy, and therefore unsightly very quickly when they are thawed, they should be used primarily for cooking. You can use it to flavor soups, sauces, or stews. The spicy-hot taste goes very well with many hearty dishes.
Blossoms frozen in ice cubes are great for cooling drinks. They look very decorative in a summer punch, for example. Flowers frozen without water are also suitable as a decoration, but they thaw very quickly and then lose their beauty.
The essentials in brief:
- Cut leaves into small pieces
- Freeze flowers undamaged if possible
- freeze in small portions
Other methods of preservation
Freezing is not equally suitable for all parts of the nasturtium. However, the method of preservation also depends heavily on later use. You can, for example, pickle the buds in vinegar and use them as “fake” capers. The blossoms are excellent for making blossom vinegar, which you can use to refine salads.