Beat eggs in a medium mixing bowl until frothy. Add milk, onion, salt, pepper, and 1/4 teaspoon paprika, beating well. Stir in ham and pimiento. Pour mixture into 6 greased 1/2-cup molds. Place molds in a pan with 1 inch hot water. Cover with greased brown paper. Bake at 350° for 30 minutes or until a knife inserted in center comes out clean.
Cool slightly; loosen edges of timbales with a knife. Invert molds onto a serving plate. Spoon Béchamel Sauce over timbales; sprinkle with additional paprika. Serve hot.