1 / Cut and seed the tomatoes and the pepper.
2 / Heat the pan with some oil over medium heat and add the red onion.
3 / Sweat for 5 min then add the tomatoes, pepper and vinegar.
4 / Simmer over low heat and covered 45 minutes.
5 / Pour the maple syrup or honey as well as the spices then simmer without lid for 30 minutes to evaporate liquids.
6 / Mix in the blender and let cool, before filling our own bottle of ketchup with a funnel.
You can add 3 tbsp of soy sauce at the same time as the vinegar for a ketchup slightly more salty version of your ketchup.