HEAT oil in large nonstick skillet set over medium-high heat. COOK onion and garlic for 3 to 5 minutes, stirring often, or until softened. STIR in cumin, oregano, salt, tomato paste and chipotles for 1 minute or until combined. ADD tomatoes with juice; reduce heat to medium-low and simmer for 2 to 3 minutes or until slightly thickened. REMOVE skillet from heat and cover to keep warm.
For Sunny-Side Up, Over-Easy or Over-Hard Eggs: HEAT butter in large nonstick skillet set over medium-high heat until just melted. BREAK eggs and slip into skillet 1 at a time. Immediately reduce heat to low.
COOK eggs for about 5 minutes or until whites are completely set and yolks begin to thicken but are not hard. SERVE as is or flip eggs over carefully and cook to desired doneness. SPRINKLE eggs lightly with salt and pepper.
Prepare recipe with Queso Fresco instead of the feta cheese if desired.
For heartier appetites, serve tortillas topped with 2 fried eggs.