Preheat the oven to 425°F (220°C).
Slice the French bread loaf in half lengthwise.
In a mixing bowl, stir together the softened butter, sea salt, minced garlic, and parsley until evenly combined.
Spread about half of the garlic butter mixture onto the cut surface of one bread half using a spatula.
Place the two bread halves together, wrap tightly in aluminum foil, and set on a baking sheet.
Bake wrapped bread in the preheated oven for 30 minutes, until the butter is melted and the bread is heated through.
While the bread bakes, place the remaining butter mixture in a small saucepan and heat gently for 2 to 3 minutes until the garlic becomes fragrant, stirring to avoid burning.
Remove the bread from the oven and unwrap to check it is hot throughout.
Brush or drizzle the warmed garlic butter over the bread for extra flavor and sprinkle additional minced fresh parsley if desired.