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1
Heat 1 tsp.
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2
melted butter in large skillet over medium heat.
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3
Add leeks, and season with salt, if desired.
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4
Cover, reduce heat to medium-low, and cook 7 to 10 minutes, or until tender.
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5
Set aside.
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6
Brush 4 slices bread with half of remaining melted butter, and set butter side down on baking sheet.
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7
Divide Provolone among bread slices, and layer each with one-quarter of leek mixture and 1 red bell pepper half (if using).
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8
Cover with remaining bread slices.
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9
Brush sandwich tops with remaining melted butter.
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10
Heat large skillet or griddle over medium-low heat.
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11
Cook sandwiches in skillet 4 minutes, or until browned and crisp.
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12
Flip, and cook 3 minutes more,
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13
or until second side is browned.
