Slow Cooker Sausage, Cabbage, and Potatoes

Bahan-bahan (4 porsi)

• 2 tablespoons unsalted butter
• 2 tablespoons extra virgin olive oil
• 1 yellow onion (large, chopped)
• 4 cloves garlic (minced)
• 5 Yukon gold potatoes (small/medium, cut into 3/4 inch pieces)
• 12 ounces smoked turkey sausage (such as kielbasa)
• 1 1/2 teaspoons kosher salt
• 1 1/2 teaspoons dried oregano
• 1 teaspoon ground black pepper
• 1/4 cup water
• 5 cups cabbage (chopped, about 1 large head)
• 1 cup chopped roasted red bell peppers (from a jar)