Olive Oil Mashed Potatoes

Bahan-bahan (6 porsi)

• 2.5 lbs . russet potatoes ($2.12)
• ½ tsp garam (untuk memasak air, $0,02)
• 4 g arlic cloves ($0.16)
• ¼ cup olive oil (extra virgin, $0.88*)
• ½ tsp dried rosemary ($0.05)
• 1 cup vegetable broth (warmed, $0.13**)
• black pepper (freshly cracked, $0.03)
• salt (to taste, (about 3/4 tsp) $0.05)