To a food processor, add the shrimp, egg white, scallions, soy sauce, oyster sauce, toasted sesame oil, minced ginger, and white pepper. Blend until smooth.
Pour the sesame seeds onto a plate.
Spread ¼ of the shrimp paste onto each slice of bread. Press the shrimp side of the bread into the sesame seeds.
For each slice of bread, add 2 tablespoons of oil to a shallow dish. Press the bread side into the oil and move it around to get it evenly coated. Transfer to a nonstick baking sheet with the bread facing down.
Bake for 8 minutes, then flip and bake for another 4 minutes until the bread is golden brown.