High Protein Veggie Pizza: 5 Easy Steps

This high protein veggie pizza started as my answer to a problem every mom knows: getting vegetables into kids who would happily eat plain cheese pizza every night. The whole tray is loaded with air-fried eggplant, red and yellow peppers, and onion, then topped with canned tuna for protein and a generous blend of melted cheese (see photo). The air fryer is the trick – it gives the vegetables that roasted, caramelized flavor without the oil of pan-frying. With four kids at the table, a tray this size disappears in one sitting. Here is how I build it, layer by layer, so the crust stays crisp and nothing goes soggy.

Why You’ll Love This High Protein Veggie Pizza

• Loaded with vegetables and protein. Air-fried eggplant, peppers and onion plus canned tuna means every slice carries real nutrition, not just cheese and crust.
• The air fryer does the hard work. No standing over a pan sauteing vegetables in oil – the air fryer roasts them tender and slightly caramelized while you make the dough.
• A crust with real backbone. Half all-purpose flour, half semolina gives a sturdier, crispier base than flour alone – it holds up under a heavy load of toppings.
• It feeds a crowd. This high protein veggie pizza is a full sheet-pan pizza, cut into squares – enough for a hungry family with slices to spare.

Ingredient Notes

Ingredient	What to know
Semolina (1.5 cups)	Fine semolina, not coarse. Combined with all-purpose flour, it gives the crust a firmer bite and a slight golden color. If you cannot find it, you can use all all-purpose flour, but the crust will be softer.
Plain yogurt (1/2 cup)	This goes into the dough and makes it tender and easy to stretch. Use plain, unsweetened. It also gives the crust a very subtle tang, a little like a quick sourdough note.
Canned tuna (drained)	Drain it very well – wet tuna makes the top soggy. Tuna in water keeps the pizza lighter; tuna in olive oil adds richness. Either works, but drain thoroughly.
Eggplant	The air fryer is what makes eggplant work here. Raw eggplant is spongy and bitter, but air-fried it turns silky and savory. Cut it into even cubes so it cooks uniformly.
Cheese blend	I use Edam and Emmental for a savory, melty flavor, but this is flexible – mozzarella alone works, or any melting cheese you like. Use what you have.

How to Make High Protein Veggie Pizza – Step by Step

Air-fry the vegetables first. Cube the eggplant, chop the peppers, and slice the onion into even pieces (see photo). Toss them with a little olive oil and air-fry at 356°F (180°C) for about 20 minutes, until tender and lightly caramelized (see photo). Doing this first matters: raw vegetables release water as they bake, and water is what turns a pizza soggy. Pre-cooking them drives off that moisture before they ever touch the dough.

Make the dough while the vegetables cook. Combine the flour, semolina, salt, yeast, yogurt and olive oil, then add warm water gradually as you knead until the dough comes together and is smooth (see photo). The warm water wakes up the yeast; if it is too hot it kills it, so aim for comfortably warm, not scalding. Cover and let it rest until it has doubled in volume.

Roll it out on parchment. Roll the risen dough directly onto parchment paper on your baking tray (see photo). This is a real time-saver – you never have to transfer a loaded, floppy pizza, and cleanup is nothing.

Sauce and season the base. Spread tomato sauce over the dough and scatter dried oregano across it (see photo). Do not drown it – a thin, even layer of sauce keeps the crust from going soft under the toppings.

Layer in order: vegetables, then tuna, then cheese. Spread the air-fried vegetables first, break the drained tuna over the top (see photo), and finish with a generous layer of cheese (see photo). This order matters – the cheese on top forms a lid that holds everything together as it melts.

Bake until golden and bubbling. Bake in a preheated oven until the crust is golden at the edges and the cheese is fully melted and just starting to brown, about 15 to 20 minutes. I bake mine at around 430°F (220°C) – watch the crust edges and pull it when they turn deep golden.

My Top Tips for the Best High Protein Veggie Pizza

• Always pre-cook watery vegetables. Eggplant, peppers and onion all hold water. Air-frying them first is the single most important step for a crisp, not soggy, pizza.
• Drain the tuna hard. Press it against the side of the can or a sieve. Any liquid it carries ends up in your crust.
• Do not over-sauce. A thin layer is plenty. Too much tomato sauce is the second most common cause of a soft base.
• Roll thinner than you think. The semolina crust puffs and firms as it bakes. A thinner base gives you that crisp-bottom, sturdy-square texture.
• I make this pizza whenever I need dinner to feel like a treat but still want it packed with vegetables – it is one of the few ways everything on the tray gets eaten without anyone picking around the peppers.

If you like cooking with eggplant, try my chermoula stuffed eggplant next – same vegetable, a completely different, saucy result.

The order of the layers is the whole secret to a pizza that holds together: sauce, then vegetables, then protein, then cheese on top. The cheese melts into a lid that binds every topping to the crust, so your slices lift clean instead of sliding apart.

Common Problems and Fixes

Why is my high protein veggie pizza soggy in the middle?

Almost always too much moisture on top. Either the vegetables were not pre-cooked, the tuna was not drained well, or there was too much sauce. Air-fry the vegetables, drain the tuna hard, and keep the sauce layer thin.

Why is my pizza crust not crispy?

Two usual reasons: the dough was rolled too thick, or the oven was not hot enough. Pizza needs a hot oven to crisp the base quickly. Roll thinner and make sure the oven is fully preheated before the tray goes in.

Why did my eggplant turn out bitter?

Undercooked eggplant stays bitter and spongy. It needs to be fully softened and lightly caramelized in the air fryer before it goes on the pizza. If it still looks pale and firm, give it more time.

Can I make the dough ahead of time?

Yes. After kneading, you can keep the dough covered in the fridge for up to 24 hours. A slow cold rise actually improves the flavor. Bring it back to room temperature before rolling it out.

Storage and Make-Ahead

Leftover high protein veggie pizza keeps in an airtight container in the fridge for up to 3 days. Reheat slices in a hot oven or air fryer rather than the microwave – the microwave steams the crust soft, while dry heat brings the crisp back. You can prep ahead in stages: air-fry the vegetables and make the dough a day in advance, both stored separately in the fridge, then assemble and bake fresh when you want it. The baked pizza also freezes well in slices for up to 2 months.

FAQ

This high protein veggie pizza has become the way I get everyone at my table eating their vegetables without a single complaint – the air-fried peppers and eggplant practically disappear under the cheese. If you like the tuna-and-vegetable combination, you will love my creamy tuna macaroni salad next. And to see exactly how I layer the tray before it goes in the oven, the short video is right here.