In a large pot, bring broth, 4 cups water and salt to a boil.

Meanwhile, wrap garlic, sage, rosemary, bay leaf and chile flakes in cheesecloth and tie with twine to make a pouch.

Reduce the heat to low, add herb pouch and simmer for 10 minutes.

Remove and discard pouch, then add kale and simmer for 10 minutes.

Drain kale, return liquid to the pot and return to a simmer. Set kale aside.

In a medium bowl, mix the two types of polenta together.

With the broth mixture at a simmer, pour polenta into the pot in a slow, steady stream while stirring with a wooden spoon.

Keeping the heat very low, stir slowly every few minutes for about 40 minutes.

If some lumps form, press them against the side of the pot to dissolve them. Polenta should be thick and creamy.

While polenta is cooking, heat 1 tablespoon of the oil in a large skillet over medium heat.

Add sausage and cook until golden brown all over. Drain and reserve.

To finish polenta, turn off the heat, cover pot and let rest, without stirring, for 10 minutes.

Remove lid and stir polenta, scraping the sides of the pot with the wooden spoon.

Add reserved kale, beans, 1/4 cup of the cheese, 1/2 cup of the parsley and remaining 2 tablespoons oil and stir gently to incorporate all the ingredients.

Cook for another 2 minutes at a simmer, continuing to stir.

To serve, top polenta with sausage and sprinkle with remaining cheese and parsley.