Authentic Homemade Zuppa Toscana - a hint of rosemary

Ingredients

• 16 ounces mild Italian sausage
• 1/4 teaspoon crushed red pepper, or more if desired ((optional))
• 4 slices bacon, cut into 1/4" pieces
• 1 large onion, diced ((about 8 ounces / 2 cups))
• 1 tablespoon minced garlic
• 64 ounces chicken broth or stock
• 32 ounces Yukon Gold potatoes, cut into 1" cubes ((about 6 cups))
• 8 ounces whipping or heavy cream
• 1/2 bunch laminate kale, destemmed & coarsely chopped ((about 2 cups))