Season the salmon and sprinkle with lemon juice.
Heat the oil in a skillet. Add the salmon. Cook a few minutes on each side.
Set aside the salmon. Clean the skillet with paper towel. Heat a skillet over medium heat. Melt the butter. Cook the garlic about 30 s.
Add the spinach. Stir for about 1 min. Add the tomatoes, dill, lemon juice, season with pepper. Stir to combine. Add the salmon. Cook for 3-4 min.