Combine all ingredients (tomato paste, broth, garlic, sugar, Parmesan, Italian seasoning, onion powder, red pepper flakes, and salt) in a medium bowl until smooth.
If you have the time, set aside for a few minutes to allow the flavors to meld.
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Notes
*This recipe makes enough sauce for two large 12-14 inch pizzas.Storage tipsLeftover pizza sauce keeps well in the refrigerator in a glass jar or other airtight container for about a week. It can also be frozen for up to 3 months, or canned.