Salisbury Steak dengan Kuah Jamur

Bahan-bahan (4 porsi)

• 1 yellow onion, divided ($0.32)
• 1 lb . daging giling ($5,15)
• 1/2 cup breadcrumbs ($0.13)
• 1 large egg ($0.23)
• 2 Tbsp Saus Worcestershire, dibagi ($0,05)
• 1 tsp Italian seasoning ($0.10)
• 1/2 tsp salt ($0.02)
• 1/4 tsp pepper ($0.03)
• 1 Tbsp cooking oil ($0.04)
• 8 oz . mushrooms ($1.69)
• 2 Tbsp butter ($0.26)
• 2 Tbsp all-purpose flour ($0.02)
• 1.5 cups kaldu sapi* ($0,20)
• garam dan merica secukupnya ($0,05)