The brands that were selected for the tasting are listed below and were purchased at local area grocery stores. Will the DOPs stand up to the 'regular' tomatoes? Stay tuned as the results will be posted sometime after I recover from Saturday's event.

Hunt's
Furmano (without basil)
Ferrara
Muir Glen (whole tomatoes, not plum)
Redpack
Sun of Italy
Cento, DOP (with basil)
Flora, San Marzano, DOP (with basil)
Here are the 2 recipes that were used to make the sauces for the tasting. Everything possible was done to keep things as consistent as possible in our home kitchens.
Olive Oil Recipe Based on Mario Batali's Basic Pasta Sauce from Simple Italian Food
3 oz. extra virgin olive oil
12 oz. onion ~1/4 inch dice
1 oz. garlic thinly sliced
2 oz. finely grated carrot
1 1/2 T dried thyme
3 28 oz. cans of whole peeled tomatoes ~1/2 dice
1/4 t salt
Heat oil in a sauce pan over medium heat.
Add onions and garlic and cook until soft and light golden in color (10 minutes).
Add carrot and thyme and cook until the carrot is soft (5 minutes).
Add tomatoes and salt and bring to a boil.
Reduce heat and simmer until thick (50 minutes).
Butter Recipe From Marcella Hazan's Essentials of Classic Italian Cooking
10 ounces unsalted Land ‘O Lakes butter
24 ounces peeled yellow onion (in half onion pieces)
3 (28-ounce) cans whole tomatoes, with their juice, chopped into ~1/2” dice
3/4teaspoon salt
Put the butter, onion, and tomatoes (with their juice) into a 6-quart saucepan and bring to a simmer. Cook, uncovered, stirring every 15 minutes, for 60 minutes. With a slotted spoon, remove the pieces of onion from the sauce and discard. Add salt. Blend with stick blender, twenty 1-second pulses.
Both batches were allowed to cool for 90 minutes at room temperature, then cool for 8-10 hours in the refrigerator, then frozen.