You will need:
Cans of diced tomatoes in juice totaling 6lbs
1 Large onion, diced.
2 Tablespoons chili flakes
1 cup Cider Vinegar
1 cup White Vinegar
2 cups sugar
a pinch of allspice
salt to taste
Xanathan gum
In a pot, saute your onions in a bit of oil until translucent, add the allspice chili flakes and cook for a minute on low heat then throw in the vinegars and tomatoes and sugar and cook for about an hour or until reduced by 1/3. Season with salt to taste adding more chili flake if you like it more spicy. Puree in a blender adding small amounts of xanathan gum until it reaches the desired viscosity.