I'm trying to find approved canning recipes for tomato-based products (marinara, chili, taco sauce, etc.) that do not have sugar in them. Do you know of any? I'm fine with sugar substitutes or without sweeteners.
The sugar in these recipes are for quality, rather than safety. You can leave it out. I would not suggest adding alternative sweeteners before canning. These can be added after opening the jar.
You can learn about low-sugar food preservation and alternative sweeteners in the following articles:
- Preserving for Special Diets, OSU Extension
- Sweeteners: Nutritive & Non-Nutritive, OSU Extension
You mention canning chili and tomato products, and I suggest reading these resources for safe procedures and which ingredients to avoid when canning soups:
- Canning Tomatoes and Tomato Products, OSU Extension publication
- Canning Soup, OSU Extension
- Salsa Recipes for Canning, PNW Extension publication