Cheesy Sausage Cabbage and Broccoli Bake

• 1 tablespoon olive oil
• 1 ring (14 ounces) smoked sausage, or kielbasa, cut into ¼-inch rounds
• 1 medium head green cabbage, core removed, sliced into thin rings, cut in half
• 1 small head broccoli, cut into small florets (about 2½ cups)

Cheese Sauce

• 1 cup (238 g) heavy cream
• 2 tablespoons unsalted butter
• 2 ounces cream cheese
• ½ teaspoon garlic powder
• ½ teaspoon paprika
• ½ teaspoon kosher salt
• ¼ teaspoon black pepper
• ¼ teaspoon crushed red pepper
• 2 cups (226 g) sharp white cheddar cheese, shredded

Topping

• 1 cup (113 g) Gruyere cheese, shredded
• Parsley, for garnish