Preheat the oven to 425°F (220°C). Line a large baking sheet with parchment paper or lightly oil it.
Pat the sardines completely dry with paper towels and arrange them in a single layer on the prepared baking sheet.
In a small bowl, mix together the olive oil, garlic, lemon zest, thyme, smoked paprika, salt, and black pepper.
Brush the garlic herb mixture generously over both sides of the sardines.
Roast for 12–15 minutes, until the flesh is cooked through and the skin is golden and crispy.
Remove from the oven and immediately drizzle with fresh lemon juice.
Sprinkle with fresh parsley and serve with lemon wedges, roasted potatoes, salad, or crusty bread.