Preheat oven to 425F and line baking sheet with parchment paper.

Prepare 4 pieces of foil about 12"x12".

Add salmon (if it has skin, skin side down) on individual foils. Evenly distribute the olive oil, salt, and pepper over the four pieces of salmon.

In a large bowl, mix together sliced tomatoes, olives, artichoke hearts, and garlic. Add the juice of one lemon, olive oil, oregano, salt, and pepper. Mix until all combined.

Divide the tomato mixture amongst the four foil packets, placing the mixture on top of the salmon. It's okay if some spills out the side.

Wrap the foil packets up, again, okay if they top is not fully covered but do your best to cover it as much as possible.

Bake for 18-20 minutes or until salmon flakes with fork. Unwrap packets and top with crumbled feta and dill.

Serve immediately.