Spray large nonstick skillet with cooking spray; set aside. Cut sausage lengthwise into quarters; cut crosswise into slices. Add to prepared skillet along with the potatoes; mix well. Cook over medium-high heat 7 minutes or until sausage and potatoes are evenly browned, stirring occasionally.
Meanwhile, place drained tomatoes in microwavable dish; cover with paper towel. Microwave on HIGH 1 to 2 minutes or until hot. Stir. Cover to keep warm.
Add Egg Beaters to skillet; cook just until Egg Beaters are set, stirring occasionally. Spoon evenly onto 8 serving plates; top with the tomatoes. Sprinkle with parsley, if desired.