"I threw together this cheese omelet with some leftover ingredients I had laying around. It was easy to make and very delicious, so I thought I would post it. Garnish with more parsley and diced tomato."
Heat olive oil in a medium saucepan over medium-low heat. Add red onion and garlic; cook and stir until garlic begins to brown, about 2 minutes. Pour eggs into the pan and distribute evenly to make a omelet. Sprinkle Cheddar cheese and mozzarella cheese on top. Dollop small portions of ricotta cheese onto the omelet.
Cook omelet until edges start to harden, 1 to 2 minutes. Add tomatoes, parsley, and basil. Add onion powder; season with salt and pepper. Cook until eggs are set, 3 to 4 minutes.
Run a spatula under the omelet and lift; fold in half and transfer to a plate.