Chicken Florentine Panini

In a large skillet, saute spinach in oil for 2 minutes or until wilted; drain.

Spread four bread slices with salad dressing.

Layer with a cheese slice, chicken, spinach, onion and another cheese slice. Top with remaining bread. Butter outsides of sandwiches.

Cook on a panini maker or indoor grill until bread is browned and cheese is melted.