Ingredients:

• 1 tablespoon extra virgin olive oil
• 1/2 medium onion, chopped
• 1 (15-ounce) can whole or crushed tomatoes (preferably fire-roasted), or 1 to 2 large fresh tomatoes, when in season
• 1/2 (6 ounce) can diced green Anaheim chiles
• Chipotle chili powder, adobo sauce, or ground cumin to taste, optional
• 4 corn tortillas
• Butter
• 4 large eggs
• 2 tablespoons fresh cilantro, chopped, optional