• 1 lb russet potato $0.37
• 2 Tbsp olive oil $0.24
• 1 yellow onion $0.31
• 2 cloves garlic $0.16
• 2 Tbsp fresh grated ginger $0.14
• 1 Tbsp garam masala (or to taste) $0.50
• 28 oz can crushed tomatoes $1.69
• 2 Tbsp tomato paste $0.12
• 1/2 tsp salt (or to taste) $0.02
• 15 oz can chickpeas $1.15

Basically, do 2:1 tomato to chickpeas.