Preheat oven to 400 F. Option to line a baking sheet for easy clean up--I like to fully wrap my salmon in foil to help keep it moist, if you'd like to do this, place an extra large sheet of foil on the baking sheet and set aside.
Place salmon on baking sheet and pat completely dry with paper towels. Sprinkle garlic on top, then drizzle with olive oil and lemon juice. Sprinle with salt and pepper. Place lemon sliced on top.
Option, and strongly recommended to place aluminum foil over the top of the salmon--you can also lay a sheet of parchment paper on top. Bake in preheated oven until the salmon is cooked through and flakes easily, should be 12-15 minutes.