You need a cast iron casserole for this one
Divide the meat into 4 - roughly 250g each
Pour the wine in a pan and reduce by about a third. Leave to cool
Place the shoulder in a container and pour the reduced wine over it along with all marinade ingredients.
Chill and allow to marinate for 24 hours
Pre heat the oven to 110°C
Drain the venison and the vegetable, pat dry. Reserve the wine
In a hot non stick pan, heat the oil and sear the shoulder till golden brown all around. This should not take longer than 10 minutes. Then transfer the shoulder to the cast orn casserole
In the same pan, lightly fry the remaining vegetables for about 5 minutes, then also put them in the casserole dish
Now add the tomato puree to the same frying pan, after 2 minutes add the reserved red wine and bring to the boil
Pour it over the shoulder and veggies, then add the water until barely covered,
Add Salt and bring to the boil
Transfer to the oven and cook for 3 1/2 hours
To finsh the sauce, strain the juices into a large frying pan and reduce to about 300ml.
Reduce heat to the lowest, then add the jam. Add Salt and pepper to taste
Add the chocolate and mix quickly
Mix the sholder and vegetables in the pan and gently bring back to heat
Enjoy!