Hi Eric! Thanks for wanting to try that recipe. Easy is the best solution here.
Sad you don't have a Trader Joe's near you for the best pizza sauce anywhere imo. The topping for the casserole needs to be slightly thicker and more heavily seasoned than a classic pasta sauce. An easy solution is you could add a little more Italian Seasonings (I buy the mix of seasonings) and simmer a pasta sauce long enough for it to thicken to the consistency of pizza sauce.
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