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To cook the greens:
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Thoroughly wash the greens in cold water three times to get rid of the dirt.
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Trim the tough ends off, chop the stems into 1/4 inch slices, set aside.
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Then chop the leaves into 1-inch pieces.
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Set separately with stems.
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Heat the oil in a large nonstick skillet over medium hight heat.
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Add the onions, stirring occasionally, and cook until the onions are browned and soft, about 5 minutes.
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Stir in the prepared stems, and cook until the stems start to become soft, another 3 minutes.
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Add the greens in bunches until the leaves are wilted.
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Pour the broth into the skillet.
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Reduce the heat to low, cover and cook, stirring a few times, until the greens are very tender, about 15 minutes.
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Remove the lid, and keep simmering until all the liquid is evaporated.
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Season with salt, black pepper, and red pepper flakes to taste.
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Remove from the heat, and set aside.
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15
To make the bean spread:
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While you are cooking the greens, heat 1/2 tablespoon of olive oil in a small nonstick skillet over medium-high heat.
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Add the red onions and garlic, stirring once a while, and cook until onions start to brown and tender, about 5 minutes
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Pour in the wine, and simmer until most of the wine has been evaporated, about 4 minutes.
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Add the beans, stirring often, and cook until beans are well combined and well heated, about 3 minutes.
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Transfer the bean mixture into a food processor, process until the mixture is smooth.
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To make the panini:
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Preheat the panini maker.
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Brush one side of each slice of bread with olive oil.
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Set the bread slices on a cutting board or a large plate with the oiled side down.
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Spread same amount of the bean mixture on 2 slices of bread.
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Place same amount of the braised greens evenly on top of bean mixture.
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Place the remaining slices of bread on top, oiled-side up.
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Arrange the sandwiches in a panini maker, and cook until golden, brown and crispy.
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Note: If you don't have a panini maker, just simply cook the sandwiches in a hot nonstick skillet over medium or medium-low heat like making a grilled cheese.