In small skillet over medium heat, heat just enough butter to grease skillet until hot enough to sizzle a drop of water. Break and slip egg into skillet. Top with cheese. Add water. Cover skillet tightly to hold in steam. Reduce heat to low. Cook until white is completely set and yolk begins to thicken but is not hard. Spread salsa on tortilla. Top with egg.
Eggs Guiseppe: Substitute Mozzarella cheese for the Monterey Jack, pizza sauce for the salsa and toasted Italian bread or an English muffin half for the tortilla.
Eggs Joseph: Eliminate cheese and sauce. Substitute toasted bagel half for the tortilla. Spread bagel half with whipped cream cheese with smoked salmon or whipped cream cheese with chives. Dollop egg with additional cream cheese, if desired. Makes 1 serving.