Whisk onion, lemon (or lime) juice, oil, garam masala and salt in a bowl until well combined.Advertisement
Make Ahead Tip: Cover and refrigerate for up to 3 days.
Garam masala, a blend of spices used in Indian cooking, usually includes cardamom, black pepper, cloves, nutmeg, fennel, cumin and coriander. It is available in the spice section of most supermarkets.
Nutrition note: Based on Test Kitchen results, 2 teaspoons of marinade are absorbed per serving.