Walnut Cheddar Wheels - Diamond Nuts

Ingredients

• 1/2 cup butter, soften (1 stick)
• 2 cups grated sharp cheddar cheese
• 1 egg
• 1 tbsp mustard
• 1 1/2 cups flour
• 1 tsp baking powder
• 1 cup Diamond of California® Walnuts, finely chopped, divided
• 1/2 cup chopped pepperoni
• 1/2 cup sliced green onions