Heat a large Dutch oven or heavy-bottomed pot over medium-high heat. Add a small drizzle of oil and cook the sausage, breaking it up as it browns. Drain well and transfer to a plate.
1 pound spicy Italian sausage
Using the remaining sausage fat, cook the bacon until crisp. Transfer it to the plate with the sausage, then drain all but 1–1½ tablespoons of the grease.
8 slices bacon
Add the onion to the pot and cook for about 5 minutes. Stir in the garlic during the last minute.
1 cup yellow onion, 3 garlic cloves
Gradually pour in the chicken stock. Add the potatoes and bring to a boil.
4 cups chicken stock, 4 large russet potatoes
Simmer for about 15 minutes, or until the potatoes are fork-tender. Add the cooked sausage, most of the bacon, the heavy cream, and the kale. Cook for 5–10 minutes, until the kale wilts.
1 cup heavy cream, 1/2 bunch kale
Season with salt, pepper, and red pepper flakes if desired. Top with the remaining bacon and parmesan cheese, serve hot.
Salt, Black pepper, Pinch of red pepper flakes, Parmesan cheese