Preheat oven to 400°F (200°C). Lightly oil a baking dish or line it with parchment.
In a small bowl, whisk together olive oil, lemon juice, lemon zest, minced garlic, a pinch of salt, and a few grinds of black pepper. Taste and adjust for flavor.
Arrange the salmon fillets in a single layer in the baking dish, skin-side down if skin-on.
Baking
Pour the lemon-garlic mixture evenly over the fillets, using a spoon to ensure each piece is coated.
Bake for 15–20 minutes, depending on thickness. The salmon is done when it flakes easily with a fork and reaches an internal temperature of 125–130°F for medium-rare, or 145°F for well-done.
Garnish with chopped fresh parsley and serve immediately.
Notes
For a richer finish, swap olive oil for melted butter. Use lime instead of lemon for a different citrus profile. For low-FODMAP, use garlic-infused oil.