01 -
Grease your baking dish with olive oil, and set your oven to 400°F (200°C) to preheat.
02 -
Mix the cherry tomatoes, Kalamata olives, sliced onions, olive oil, lemon juice, oregano, and salt in a bowl. Make sure everything's coated evenly.
03 -
Lay the salmon fillets down in the greased dish, keeping the skin side underneath. Scatter the veggie mixture all around the salmon. Drizzle more olive oil over the top.
04 -
Pop the baking dish into the oven for 15-20 minutes. It's ready when you can easily flake the salmon with a fork.
05 -
Toss some chopped basil over everything just before serving.