The recipe can be found here. The only thing I would change about the sauce itself is to add more chilies (I like it spicy) and add about 1/3 cup more heavy cream. It really was quite delicious!
The organic tomato products (while no longer online, Whole Foods has coupons for Muir Glen products that expire 5/31/11, you can obtain them from the Mambo Sprouts newsletter at the front of the store. I scored this tomato paste for $.19!):