Huevos Rancheros

2 medium onions, finely chopped
1 tablespoon oil
1/4 cup red chile sauce
1 tablespoon green chile sauce
1 (8 ounce) can tomato sauce
1/2 teaspoon dried oregano, crumbled
3 large tomatoes, peeled, seeded and chopped
1 to 2 teaspoons chopped fresh cilantro
6 corn tortillas
Oil, as needed
6 fried eggs, sunny side up
12 slices avocado

Saut