Hayboxing is an old way of cooking with little power & little equipment. You can make this in a slow cooker, simmer it on the stove, pop it in an oven but why waste all that power?
Step 1: Ingredients
1 - 500 gram (1 pound) bag of split yellow peas, green are fine if you like them, I don't!
1 - Large onion, chopped fairly fine.
4 - Cups of vegetables, chopped coarse. I used brocolli, cauliflower & carrots. Frozen work well too, California mix is a go to.
3 - Litres (quarts) of water
Salt...it's the horrid to taste instruction although I would say at minimum a teaspoon, this is a big batch.
Pepper...again to taste & its optional.
Step 2: Assemble
Step 3: Prepare the Haybox.
My haybox is my bed, I put a towel down (the brown) mostly is case of a spill. My mattress is memory foam that holds the heat well but if you have an inner spring mattress you should put a blanket under for a better heat retention. Then pile up a couple blankets, pillows, what you have. The more the better up to a point...you do want to find it! Have it laid out in advance so you don't lose your heat.
Step 4: Cooking
It will take 4 - 6 hours & you might want to reheat it half way through although with a good pile of insulation like in the picture it wasn't necessary.
At the end it is best to bring it back up to a strong summer for a few minutes. Hayboxing can fall to unsafe temperatures so reheating at the end will make sure it's safe. This is vegetarian so spoilage is much less of an issue than meat dishes. I still haybox those but I do reheat midway just to be safe.