Puffed Pizza Casserole

This casserole flips pizza upside down. A saucy ground beef and tomato sauce base loaded with onions, green peppers, oregano, and garlic gets buried under a layer of melted mozzarella, then crowned with a puffed egg batter that bakes up golden and airy.

The batter is basically a quick popover mixture: milk, eggs, butter, oil, and flour beaten until smooth. It pours right over the cheese layer and puffs dramatically in the hot oven, forming a crispy, bread-like dome that traps all the cheesy, meaty goodness underneath.

A sprinkle of Parmesan on top of the batter before it goes into the oven gives you a salty, golden crust that shatters when you dig in with a serving spoon. Let it rest 10 minutes after baking so the layers set and you can scoop clean portions.

Pro Tips

• Drain the beef well. Excess grease will make the bottom of the casserole greasy and prevent the mozzarella from melting cleanly on top.
• Beat the batter for a full 2 minutes. The beating develops enough gluten to create that puffy, popover-like rise. Underbeating gives you a flat, pancake-y top.
• Don’t skip the 10-minute rest. The batter deflates slightly and firms up, making it much easier to serve clean slices instead of a sloppy mess.
• Hot pepper sauce is worth adding. Even a few dashes give the meat layer a background heat that makes the whole dish more interesting.

Variations

• Italian sausage: Replace half the ground beef with crumbled sweet or hot Italian sausage for deeper flavor.
• Pepperoni layer: Lay pepperoni slices over the mozzarella before adding the batter for a more classic pizza profile.
• Vegetarian: Skip the beef entirely. Sauté mushrooms, zucchini, and bell peppers in the sauce for a veggie version.