Onam sneaks up on you every year, doesn’t it? One minute you’re checking the calendar, the next you’re mentally counting how many banana leaves you’ll need and whether the coconut you bought last week is still good. If you’ve celebrated Onam in Kerala, you know the Sadhya isn’t really a meal, it’s closer to a small production, with twenty-odd dishes landing on a single leaf in a very particular order. Doing that in the UK, without a neighbourhood market twenty minutes away, takes a bit more planning, and usually a proper list of Onam Sadhya ingredients before you even think about switching on the stove. This guide walks through exactly what goes into a traditional Sadhya, the order it’s meant to be eaten in, and where to find the Onam groceries you’ll need, without driving between three different shops.

What Makes a Sadhya?

A Sadhya isn’t just “Kerala food”, it’s a fully vegetarian, banana-leaf feast eaten in a specific sequence, usually somewhere between fifteen and thirty dishes depending on how ambitious the household is feeling. Rice sits at the centre. Everything else, the curries, the pickles, the payasam, is built to complement it, arriving in small portions rather than one big serving. Get the core Onam food ingredients right and the rest is technique and a bit of patience on the day.

The Onam Sadhya Ingredients Checklist

Rice and Grains Matta rice (the reddish, parboiled Kerala variety) is the backbone of the meal. If you can’t get hold of it, a good basmati works as a substitute, though purists will notice the difference. You’ll also want rice flour on hand if you’re attempting payasam varieties that call for it.

Kerala Vegetables for the Core Curries This is where most people underestimate how much prep is involved. Between Avial, Thoran, Olan, Sambar and Kootu Curry, you’re looking at:

• Raw banana (plantain) and yam for Avial
  

• Ash gourd and red cowpeas for Olan
  

• Beans, carrots and cabbage for Thoran
  

• Drumsticks, pumpkin and brinjal for Sambar
  

• Black chickpeas for Kootu Curry
  
  

Fresh is genuinely better here, frozen substitutes flatten the texture, particularly in Avial, and the colour ends up duller too.

Coconut, in Every Form Kerala cooking runs on coconut, and Sadhya is no exception. You’ll need grated coconut for Thoran and Avial, coconut milk for Olan and the payasams, and coconut oil for tempering almost everything. Budget for two to three coconuts if you’re cooking the full spread, it goes further than people expect until it doesn’t.

Spices and Tempering Essentials Mustard seeds, dried red chillies, curry leaves, fenugreek seeds, turmeric and cumin form the tempering base for nearly every dish on the leaf. A jar of good sambar powder saves considerable time, though homemade always tastes sharper. Don’t skip fresh curry leaves for a dried substitute if you can help it, the flavour difference is noticeable in a way most other swaps aren’t.

Payasam Ingredients No Sadhya ends without payasam. Palada Payasam needs ada (rice flakes) and milk; Parippu Payasam needs moong dal and jaggery; Ada Pradhaman needs jaggery-sweetened coconut milk simmered down slowly. Keep jaggery, cardamom and cashews stocked, they turn up across most dessert variations.

The Finishing Touches Papadams, banana chips, pickle (puli inji is the classic) and, of course, banana leaves for serving. It’s easy to forget the leaves until the morning of, so it’s worth ordering them ahead rather than hunting on the day.

The Order It’s Meant to Be Eaten In

Part of what makes Sadhya different from a regular thali is the sequence. Salt, pickles and papadam usually go on first, followed by the mildly spiced curries like Olan and Avial, then Sambar with rice, then the sharper Rasam, and finally payasam to close things out. Nobody enforces this strictly at home, but knowing the rough order helps when you’re plating for guests who’ve never had a proper Sadhya before.

Sourcing All of This in the UK

This is usually where the plan falls apart, not the cooking, the shopping. Most UK supermarkets carry a handful of the basics at best, and hunting down proper Onam groceries across town isn’t anyone’s idea of festival prep.

This is exactly the gap an Indian Grocery Online Store fills. Lakshmi Stores UK works as a full Kerala grocery store online, so instead of treating it as a once-a-year Onam stop, it’s worth bookmarking as your regular Indian groceries shop online for anything you’d normally hunt down at an Asian supermarket online. Their Onam Sadhya essentials come as ready-grouped kits, a Sambar Mix kit with the fresh vegetables sorted, and an Aviyal Mix kit for the coconut-based curry, alongside individual items if you’d rather build your own list. Their broader Kerala grocery range covers rice, spice blends and jaggery, and there’s a dedicated payasam and sweets section for anyone not making dessert from scratch. Fresh flowers for Pookalam are also available through their festival essentials collection. if you’re decorating as well as cooking. As one of the more complete asian grocery online options for Kerala staples specifically, it saves the usual scramble across two or three separate shops.

A Shopping Checklist You Can Actually Use

Print this or screenshot it before you shop:

• Matta rice, rice flour
  

• Raw banana, yam, ash gourd, drumsticks, red cowpeas, black chickpeas
  

• Fresh coconut (2–3), coconut oil
  

• Mustard seeds, dried red chillies, curry leaves, fenugreek, turmeric, sambar powder
  

• Moong dal, jaggery, cardamom, cashews, ada
  

• Papadams, banana chips, puli inji pickle
  

• Banana leaves
  

A Few Honest FAQs

Do I really need fresh banana leaves in the UK?

 Preferably yes, they change the aroma of the rice slightly. If you can’t source them in time, a large steel plate works, but it won’t feel quite the same.

Can I prepare Sadhya a day ahead? 

Most curries hold up fine overnight and often taste better the next day. Payasam, thoran and anything with coconut milk are best made fresh, though, since the texture shifts as it sits.

Is a smaller Sadhya still “proper”? 

Completely. Ten well-made dishes beat twenty rushed ones, Onam is about the gathering as much as the count on the leaf.

Onam away from Kerala takes a bit more organising, but it’s entirely doable with the right list of Onam Sadhya ingredients and one reliable Kerala grocery store to order from. Get the shopping sorted early, and the cooking looks after itself.