Heat griddle or skillet over medium heat or to 375°F. Grease griddle with vegetable oil if necessary (or spray with cooking spray before heating).
In small bowl, stir Bisquick mix, 1/2 cup milk, 1 of the eggs and the syrup with spoon until blended. For each pancake, pour 2 tablespoons batter onto hot griddle (make 8 pancakes total). Cook until edges are dry. Turn; cook other sides until golden.
Meanwhile, heat sausage patties as directed on package. In small bowl, beat remaining 2 eggs and 1 tablespoon milk. In 8-inch nonstick skillet, melt butter over medium heat. Add eggs; cook, stirring occasionally, until set.
For each sandwich, place 1 sausage patty on 1 pancake; top with one-fourth of the eggs, 1 slice cheese and another pancake.