
Bold tuna steaks roasted alongside blistered cherry tomatoes, Kalamata olives, and tender green beans — this sheet pan dinner is the kind of weeknight meal that looks like it took serious effort but comes together with minimal fuss. The spice rub of oregano, smoked paprika, cumin, garlic, and lemon zest builds a deeply savory crust on the fish, while the vegetables soak up all those drippings as everything roasts together. Every single ingredient here is naturally free of xanthan gum, which means no label-scanning, no specialty swaps, and no compromises on flavor or texture. That's actually one of the quiet wins of cooking whole, unprocessed foods — there's nothing to worry about hiding in the ingredient list. A final squeeze of fresh lemon and a scatter of parsley tie the whole pan together with a bright, clean finish. It's a genuinely satisfying dinner that proves eating around certain additives doesn't mean eating boringly.
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Preheat the oven to 425°F (220°C). Line an 18×13-inch rimmed sheet pan with parchment paper or foil.
Spread the green beans and cherry tomatoes across the sheet pan. Scatter the olives over the top. Drizzle with 2 tbsp of the olive oil, season with 1/4 tsp salt and 1/8 tsp black pepper, and toss to coat. Spread into an even layer, leaving a clear space in the center for the tuna.
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