In the Mineclonia version of Minetest, kelp can be grown on sand or gravel in water - not dirt - and the deeper you make the pool the taller it can grow. When harvested, you must pull the entire strand and collect the extra, then replant. Here are some kelp gardens built beside houses by the sea - each of them able to produce kelp, which can be dried in a furnace and used as a food source. Once you find the other type of soybeans in the game (the brown ones, not the green ones) you can make baked tofu, and use the kelp with that to make other food. This is part of the vegetarian plant based foods mod.
You can also find, as part of the Italian foods mod, these little Italian village gardens in some places in the world - it took me a long time to find one - but they have basil and the 'other' type of tomatoes that can be made into tomato sauce and is used to make pizza and lasagna foods.
This shows what the basil and the other type of tomatoes looks like in your inventory.
Also, really weird thing - the blueberries, not in those gardens but just growing out in the world, can be made into lapis lazuli. No explanation why. Put a blueberry on your crafting board and it turns into a shard of lapis lazuli. Put nine shards together and they become a block. I haven't found it anywhere in the mining, and only found this by complete accident. The lapis lazuli shards can also be used for making blue dye.
