Mix oyster sauce, sesame oil, lemon juice, minced garlic, salt, and pepper in a bowl. Whisk until fully combined. Coat the salmon evenly with the mixture for maximum flavor.
Place the salmon in a baking dish and bake at 430°F. Cook for about 20 minutes until the fish flakes easily. The high heat locks in moisture and enhances flavor.
While the salmon bakes, cook vermicelli noodles according to package directions. Rinse with cool water and set aside. Wash and dry lettuce and mint leaves to keep them crisp.
Dip each rice paper sheet in room-temperature water until flexible. Lay it flat on a clean surface. Work quickly so it does not become too soft.
Place salmon, vermicelli, lettuce, and mint onto the rice paper. Fold the sides inward and roll tightly. Keep the salmon visible for a beautiful presentation.
Arrange rolls on a serving plate. Slice diagonally for a clean look. Serve immediately with dipping sauce.