This type of thread is a great tool for beginners and lurkers, so in that spirit, here's my recipe and my odd method of scaling it. Using the concept of baker's percentages, I call tomatos 100% and base the rest of the ingredients off of that. So, whatever size can you have or if you want to use the rest of the can for say, braciole, (yeah, that's a recommendation) you can adjust the spices accurately.
6 in 1 100.00% 1lb 12oz can (794 gms) Volume #2 1/2 can
Dry oregano 0.10% 0.8 grams 1 teaspoon
Minced dry onion 0.50% 4.0 grms 1 1/2 teaspoons
sea salt (FINE) 0.60% 4.8 grams 3/4 teaspoon
Kraft Parmesan Cheese 1.75% 14.0 grams 5 teaspoons
Black pepper 0.10% 0.8 grams 3/8 teaspoon
Garlic powder 0.45% 3.5 grams 1 1/4 teaspoon
Water 10.00% 80.0 grams 1/3 cup
Whisk together and allow to sit covered in the fridge for a day before use, unless you forgot, then use it immediately after whisking, its still real good.
Use uncooked for pizza sauce, for use as a marinara sauce for dipping the bones or calzone, put 1/2 to 1 cup in a small sauce pan and simmer on low for 5 minutes.
I like the Kraft Parmesan because it gives a familiar flavor from my childhood, its what the family used and, as far as I can tell, what every pizzerria in Philadelphia used too. I've tried the "good" stuff and just don't like it as much (wife disagrees). Volume measurements are approximate, I just weighed fractional teaspoon measures to get the totals. The recipe is adapted from two recipes of Tom Lehmann.
If we all express our recipes to percentages then it will be easier to compare formulas, also, any other uses you have for 6 in 1 would be interesting too. And, as I have posted in another area, gram scales are cheap (about 7 bucks at Amazon) and work perfectly for weighing your "herbs" so, I don't want to hear that you don't have the capacity to weigh in fractional grams.
Oh yea, its been posted around in various places here but I want to reiterate...Escalon will ship 6 in 1 for less than you usually find it for in grocery stores (when you can). I ordered 9 cans for $24.75 shipped to Alabama shipping was only $2.25, that's $2.75 a can shipped.