Remove cores and seeds of your tomatoes. You need 5lbs after removing.
Place tomatoes in a large pot. Add onion and garlic
Simmer for 1 hour, stirring occasionally
Drain as much liquid as possible, and puree the tomatoes, onion, and garlic using a high speed blender (or stainer/food mill)
Pour the ketchup back into the large pot and add the rest of the ingredients (vinegar, sugar, spices)
Bring to a boil then reduce heat and simmer, stirring occasionally for about 3 hours, or until the desired thickness is reached.
Puree the ketchup in a high speed blender, on it's highest speed until very smooth.
Pour into half-pint or pint sized jars.
Wipe the rims clean and place on lids and rings
Process in a boiling water bath canner for 15 minutes.
