Preheat an oven to 375 F. 

Line a baking sheet with parchment or foil for easy clean up. Dry your salmon filet well, then lightly sprinkle olive oil over foil or parchment. Place the salmon on the olive oil and set aside. 

In a small bowl, stir together the mayonnaise, dijon mustard, chives, salt and pepper to taste, and the juice from 1/2 a lemon.

Pour dijonnaise over top of salmon, spreading to evenly cover. Slice the second lemon and lay over top of the coated salmon, pressing softly to adhere. 

Bake in preheated oven for 20 minutes, until salmon is cooked through and flakes with a fork.