Ham-and-Hash Brown Breakfast Casserole

INGREDIENTS

• 8 bacon slices
• 3/4 cup chopped sweet onion
• 1/3 cup butter
• 1 (30-ounce) package frozen country-style hash brown potatoes, thawed
• 1 (10 3/4-ounce) can cream of chicken soup
• 1 (16-ounce) container sour cream
• 2 cups (8 ounces) shredded Colby Jack cheese
• 1 (8-ounce) package diced ham
• 1 (4-ounce) jar diced pimiento, drained
• 2 tablespoons coarse-grained Dijon mustard
• 1/2 teaspoon salt
• 1/2 teaspoon freshly ground pepper