1. Preheat oven to 325°. Heat oil in a nonstick skillet. Sauté onion 2–3 minutes or until soft; add salt, pepper, and salmon. Remove from stovetop; let cool.
2. Combine the next 4 ingredients (through milk) in a bowl. Stir in the cream cheese. Lightly coat 6 (8-ounce) ramekins with cooking spray. Add 2 tablespoons of salmon mixture to each ramekin. Pour 3/4 cup egg mixture into each ramekin. (Do not overfill.)
3. Place ramekins on baking sheet; bake 25 minutes or until a wooden pick inserted in center comes out clean. Garnish, if desired.