Peel and chop the onions. De-seed the chili and remove the stem. Chop the chili. Sauté the chopped onion, garlic, and chili in the oil for a few minutes. Add the taco seasoning. Stir the mixture for a few moments. Pour in the canned tomatoes and beans. Let simmer over mild heat for at least 15 minutes. Season with pepper. Taste the mixture. Salt may not be necessary as the taco seasoning mix has salt. Fry the eggs on a frying pan. Warm the tortillas. To assemble, spoon the bean sauce on the tortillas and sprinkle with cheese. Top with the eggs and the tomato and avocado cubes. Garnish with coriander.