Peggy's Best Au Gratin | Command Cooking

Ingredients

• 6 bacon strips
• 1 medium onion, chopped
• 4 cups potatoes, peeled and sliced, cooked
• 1/2 teaspoon salt
• 1 (10-ounce) package frozen peas, cooked and drained
• 2 cups sharp cheddar cheese, shredded, divided
• 1/2 cup mayonnaise
• 1/2 cup 2% milk