Hot-pack method
Wear gloves while handling hot peppers and avoid touching the face or eyes. Tie the pickling spices in a spice bag.
Combine tomatoes, peppers, 5% vinegar, salt, and spice bag. Bring to a boil and simmer for 20 minutes.
Remove the spice bag. Pass the mixture through a food mill. Return the liquid to the pot and boil for 15 minutes.
Fill hot half-pint jars, leaving 1/4-inch headspace. Remove air bubbles, adjust headspace, wipe rims, and apply lids.
Process in a boiling-water canner for 10 minutes at 0–1,000 ft, 15 minutes at 1,001–6,000 ft, or 20 minutes above 6,000 ft.