Boil until it has a nice gravy texture. Cut the bratwurst into slices and serve the onion gravy with the stew.
Bring a generous amount of water with a pinch of salt and the sweet potatoes to boil in a pan. Boil the potato pieces for about 15 minutes.
In the meantime, heat plant based oil and fry the onion rings and garlic at low heat until the onions start to caramelize.
Prepare the Garden Gourmet Bratwurst according to the instructions on the packaging.
Drain the potatoes and squash, if necessary with a knob of butter, into a smooth puree. Add rocket lettuce and mix through the puree.
Mix the onion rings with stock and add ketchup/sweet soy sauce and mustard.