1. Preheat oven to 200°F. Slice the Kaiser roll in half horizontally, and lay the cheese slice on the bottom half. Place both pieces of the roll in the oven for about 5 minutes, until the cheese is melted.
2. In a skillet over medium-high heat, heat the sausage patty, turning occasionally, until the sausage is heated through. Remove from heat.
3. Reduce the skillet heat to low, and add the eggs. Scramble the eggs, cooking slowly and folding, so that they form a loose, omelet-like patty.
4. Place the heated Kaiser roll open on a plate, and top the melted cheese with guacamole, tomato, and sausage patty.
5. With a spatula, remove the scrambled eggs from the skillet and lay on top of the sausage.
6. Top the eggs with red onion slices if desired, replace the top half of Kaiser bun, and serve.

Makes one sandwich.