Homemade Tomato Paste???

Certainly!

Here's how I do it:

First wash and core a bunch of tomatoes.
Put them in a blender & then pour into a crockpot.
When your crockpot is full add some salt & pepper. (You could also add basil or garlic powder if you wish)
Put crockpot on high until it begins to boil.
Turn down to low & allow to cook for about 12-16 hours.
Stir occasionally. 
When it's good & thick pour into ice cube trays.
Freeze and then pop them out and put into a freezer bag.
There you have it... homemade tomato paste from your fresh garden tomatoes!