Grilled Ham and Cheese Waffle Sandwiches

In a medium bowl stir together the flour, sugar, basil, baking powder, and salt. Add egg, milk, shredded cheese, and oil. Stir just until moistened. Add batter to a preheated, lightly greased waffle iron and bake according to manufacturer's directions. When done, use a fork to lift waffle off waffle iron. Repeat with remaining batter. You should have 8 4-inch waffles.

For each sandwich, spread waffles with mustard. Layer ham, sliced cheese, and arugula on half of the waffles. Top with remaining waffles, spread side down.

Heat a griddle or 12-inch skillet over medium heat. Add butter until melted. Add sandwiches. Cook for 4 minutes or until cheese is melted, turning once.