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Based on a recipe by ichigoshortcake.com. I daresay the chorizo can be replaced with pepperoni or similar, and the cheddar with gruyere or Swiss cheese or the like. I tried it once with chopped tomatoes and somehow it made a difference for the worse (in my taste): I prefer it with whole peeled tomatoes, they largely decompose during cooking anyway.
More recipes in my folder: Quick Food, Not Fast Food