Fermented foods contain a large amount of beneficial good bacteria that maintain a healthy flora in your gut and supports a healthy immune system. Great sources of fermented foods are sauerkraut, pickles, and kefir. Find more great info on fermented foods over at Wellness Mama.
Recipe adapted, check out the full recipe with step by step directions over at Stupid Easy Paleo
3 Ingredient Easy Homemade Sauerkraut Recipe
Thinly slice cabbage add half cabbage and add half salt, mix well. The cabbage will begin to wilt. Add the remaining cabbage, mix well and wait for moisture to begin to drip off cabbage. Place cabbage and liquid in mason jar and pack tightly. Continue to monitor and pack until cabbage is completely submerged in liquid. Keep uncapped mason jar in an area away from direct sunlight and cover with a towel. Allow 7-10 days to ferment!