Slow Cooker Christmas Morning Breakfast Casserole (Overnight Easy) - My Home Made Recipe

Ingredients

• 1 lb (450 g) breakfast sausage, preferably gluten-free if needed
• 1 tablespoon unsalted butter or cooking spray, for greasing
• 1 bag (30 oz / 850 g) frozen shredded hash browns
• 1 red bell pepper, diced
• 1 green bell pepper, diced
• 1/2 cup (75 g) finely diced yellow onion
• 2 1/2 cups (280 g) shredded sharp cheddar cheese
• 12 large eggs
• 1 cup (240 ml) whole milk
• 1/2 cup (120 g) sour cream
• 1 teaspoon dry mustard
• 1 teaspoon garlic powder
• 1 teaspoon kosher salt
• 1/2 teaspoon black pepper
• 2 tablespoons sliced green onions, for serving