Using a whisk, blend oil, water, milk, egg whites, and pancake mix in a medium bowl. Set aside.
Scramble 2 eggs with Gruyere cheese in a skillet until fully cooked. Set aside.
Pour 1/3 cup batter onto lightly greased and preheated waffle iron.
Place ¼ amount of each: scrambled eggs, cherry tomatoes, bell peppers, and basil leaves onto batter.
Pour an additional 1/3 cup batter onto toppings. Cook waffles until steaming stops or until golden brown; about 5-6 minutes.
Serve hot.