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1
For the polenta: Bring the chicken stock to a boil in a large pot.
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2
Add the polenta and whisk until fully incorporated, 3 to 4 minutes.
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3
Sprinkle with the salt and cook, covered, over medium heat for 5 to 6 minutes.
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4
Finish by folding in the melted butter.
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5
Keep warm while you prepare the chorizo.
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6
For the chorizo: Coat a large saute pan with olive oil and set over medium-high heat.
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7
Add the onions and cook until almost translucent, and then add the ground pork.
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8
Brown 4 to 5 minutes while breaking the pork pieces up with the back of a wooden spoon.
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9
Add the paprika, granulated garlic, onion powder, chili powder and cumin, and sprinkle with salt and pepper.
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10
Cook 1 minute longer to toast the spices, and then add the vinegar, garlic and tomatoes.
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11
Simmer until the sauce is thickened and reduced, 8 to 10 minutes.
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12
Taste and season once more with salt and pepper.
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13
Keep warm.
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14
For assembly: Wash, drain and finely slice the chard.
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15
Heat the garlic and some olive oil in a large pan and saute, 3 to 4 minutes.
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16
Season with salt and pepper.
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17
Drain in a colander and squeeze out any excess moisture.
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18
Preheat the oven to 350 degrees F. Lightly grease an 8-by-8-by-2-inch gratin dish or an oval 9-inch cast-iron pan.
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19
Pour half of the polenta in and spread out evenly.
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20
Top with half of the chorizo and all of the Swiss chard.
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21
Sprinkle with half of each cheese.
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22
Repeat with a layer of the remaining polenta, then the remaining chorizo, and finally the remaining cheese.
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23
Cover with foil, place the dish on a sheet tray and bake 30 minutes.
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24
Remove the foil and bake until the cheese is golden and bubbly, 15 minutes longer.
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25
Let sit 25 minutes to set up, then cut into portions and serve.