Savory Cheddar Pie

Ingredients

• 3/4 cup flour
• 1/2 teaspoon salt
• 1/2 teaspoon ground mustard
• 1 cup cheddar cheese shredded
• 1 cup butter or margarine, melted
• 2 cups onion chopped
• 3 tablespoons butter or margarinne
• 1 cup mushrooms sliced
• 1 cup egg noodles thin, cooked and drained
• 2 large eggs
• 1 cup milk
• 1/2 teaspoon salt
• 1/2 teaspoon black pepper
• 1 cup cheddar cheese shredded