Place diced tomatoes, jalapeƱos, broth, salt and garlic in a blender and process on high for 1 minute or until smooth. There should be between 2 1/2 to 3 cups of sauce. (add additional broth if necessary)
Heat a 12" skillet over medium high heat. Add olive oil and saute onions until soft and translucent, about 2-3 minutes.
Add tomato mixture and bring to a simmer. Reduce heat to medium low and continue cooking uncovered about 8 minutes. Stir occasionally.
Add tortilla chips to skillet and stir to coat chips with sauce. Crack eggs over chips, evenly spacing them. Reduce heat to low, cover and continue simmering about 4 minutes.
Sprinkle with shredded cheese, cover and cook an additional 2 minutes, just until eggs are set
Garnish with sliced avocados, cilantro, chopped tomatoes. Serve sour cream on the side.