Meanwhile, in 6- to 8-inch nonstick skillet, melt butter over medium heat. Pour eggs into skillet; beat. Sprinkle with ham. As mixture begins to set at bottom and side, gently lift cooked portions with spatula so that thin, uncooked portions can flow to bottom. Avoid constant stirring. Cook 3 to 4 minutes or until eggs are thickened throughout but still moist.