Paprika Isi Steak Keju Philly

Bahan-bahan (4 porsi)

• 2 g reen bell peppers (halved, $1.72)
• ¼ tsp salt (divided, $0.01)
• ¼ tsp freshly cracked black pepper (divided, $0.02)
• 1 yellow onion (sliced thin, (mine was just under 1lb) $0.78)
• 4 Tbsp butter (divided, $0.53)
• ¼ cup vegetable oil (divided, $0.20)
• 8 oz white mushrooms (sliced thin, $1.98)
• 1 tsp garlic powder ($0.06)
• 1 Tbsp Saus Worcestershire ($0,15)
• 14 oz steak daging sapi serut ($7,49)
• 4 slices Provolone cheese (*, $0.72)