Haven't had the time to try and tweak this recipe yet. I went to the JWMarriott in Orlando and their restaurant had homemade ketchup... what a treat!!! This recipe is from epicurious.
- 1 (28-oz) can whole tomatoes in purée
- 1 medium onion, chopped
- 2 tablespoons olive oil
- 1 tablespoon tomato paste
- 2/3 cup packed dark brown sugar
- 1/2 cup cider vinegar
- 1/2 teaspoon salt
Purée tomatoes (with purée from can) in a blender until smooth.
Cook onion in oil in a 4-quart heavy saucepan over moderate heat, stirring, until softened, about 8 minutes. Add puréed tomatoes, tomato paste, brown sugar, vinegar, and salt and simmer, uncovered, stirring occasionally, until very thick, about 1 hour (stir more frequently toward end of cooking to prevent scorching).
Purée ketchup in 2 batches in blender until smooth (use caution when blending hot liquids). Chill, covered, at least 2 hours (for flavors to develop).