Ingredients
2 slices sweet onion1 teaspoon plus 1 tablespoon butter, divided5 Greek olives, sliced2 teaspoons spicy brown mustard2 slices rye or pumpernickel bread3 tablespoons crumbled feta cheese2 slices Swiss cheese
Preparation
Saute onion in 1 teaspoon butter in a small skillet until tender and lightly browned. Add olives; cook 1 minute longer. Spread mustard over bread slices. Layer one slice with onion mixture and cheeses. Top with remaining bread. Spread outside of sandwich with remaining butter.
Toast sandwich in a small skillet over medium heat for 2-4 minutes on each side or until cheese is melted.
