Sweet Potato Hashbrown Breakfast Casserole

Bahan-bahan (12 porsi)

• 1 sweet potatoes (large, or 2 medium, about 24 ounces, peeled and diced into 1/2-inch cubes)
• 1 pound sausages (of choice, beef, chicken or turkey, casings removed)
• 1 red onion (roughly chopped)
• 1 teaspoon garlic (minced)
• 1 red bell pepper (deseeded and diced)
• 1 g reen bell pepper (deseeded and diced)
• 1 cup mushrooms (sliced)
• 2 cups baby spinach leaves (washed)
• 1 cup grape tomatoes (cherry tomatoes, halved)
• 1 pinch salt (to taste)
• 1 pinch ground black pepper
• 10 eggs (large)
• 1/3 cup milk
• 2/3 cup shredded mozzarella cheese (or cheddar)