In a pie plate (or similar dish), combine eggs, vanilla, milk, ground cinnamon (if using), black pepper (if using), and salt (if using).
Stir vigorously with a fork until well combined. Soak each slice in mixture. Flip each slice over with a spatula to prevent tearing. Leave in pie plate.
Melt butter in a skillet over low-medium heat.
Use spatula to move soaked bread slices from pie plate to skillet with melted butter. Cook 3-4 minutes over low-medium heat. Flip over. Cook another 3-4 minutes. Both slices should be golden brown on both sides.
Turn heat off.
Use spatula to move French toast from skillet to plate. Place two cooked sausage patties on one slice. Top with second slice.
Drizzle sandwich with honey. Sprinkle with powdered sugar (optional). Serve hot.