Apple-Cheddar Waffle Panini

In a small bowl, mix mustard and maple syrup. Spread mixture on one side of four leftover waffles. Place 1 3/4 ounces grated sharp Cheddar cheese (about 1/2 the cheese) on two of these waffles. Thinly slice apple and divide between same two waffles, layering atop cheese. Sprinkle another 1 3/4 ounces grated sharp Cheddar cheese over apples. Top with remaining two waffles, spread-side down. Place panini in a lightly oiled large skillet over medium-low heat. Set a plate or cake pan on top of panini and weigh down with food cans. Cook until waffles are toasted and cheese melts, about 8 minutes, turning after 4. (Alternatively, use a panini press and cook according to manufacturer's instructions.) Slice panini in half.