Place potatoes in a large saucepan, and cover with water. Bring to a boil, and cook 25 minutes or until tender. Drain; cool slightly. Cut potatoes into 1/2-inch cubes.
Preheat oven to 375°.
Heat a medium nonstick skillet over medium heat. Coat pan with cooking spray. Add onion, bell pepper, and garlic; sauté 5 minutes or until tender. Remove from heat. Stir in potato, cheese, and bacon.
Combine egg substitute, salt, and black pepper. Spoon vegetable mixture evenly into 12 muffin cups or 6-ounce ramekins coated with cooking spray. Pour egg mixture evenly over vegetable mixture. Bake at 375° for 18 minutes or until set. Remove from muffin cups, and cool slightly.