fast-casual

Low FODMAP at LEON - Complete Ordering Guide

Complete guide to ordering low FODMAP at LEON UK. Navigate this 'naturally fast food' chain while avoiding garlic, onion, and wheat-containing items.

Last verified: December 26, 2025 View Allergen Menu →
LEON

Safe Items to Order

ItemNotesModifications
Plain Grilled ChickenRequest without marinade or sauceAsk for completely plain
Plain RiceWhite or brown riceWithout any sauce or toppings
Side SaladPlain greensNo dressing, ask for olive oil
Steamed VegetablesPlain steamed vegNo sauce or seasoning

Items to Avoid

  • Baked Fries (contain garlic powder and onion powder)
  • Most sauces (contain garlic and onion)
  • Aioli (contains garlic)
  • Arancini (wheat coating)
  • Wraps (wheat tortillas)
  • Most marinades (contain garlic/onion)
  • Chargrilled items with standard marinade
  • Hash browns (check ingredients)
  • Most dressings

Example Orders

Safe Rice Box

  • Plain rice
  • Grilled chicken (plain, no marinade)
  • Steamed vegetables (no sauce)
  • Olive oil drizzle

Tip: Ask for everything plain with no sauce

Simple Protein Plate

  • Grilled chicken (plain)
  • Side salad (no dressing)
  • Olive oil and lemon

Tip: Skip the standard LEON sauces

Coffee and Snack

  • Black coffee
  • Check for any plain protein options

Tip: Very limited snack options

Quick Summary

LEON markets itself as “naturally fast food” with healthy options, but navigating FODMAP at LEON requires careful attention. Many items contain hidden garlic and onion powder.

Best bets: Plain rice + plain grilled protein (no marinade) + plain vegetables

Always avoid: Baked fries (contain garlic/onion powder), all sauces, wraps

Important: The Fries Contain Garlic & Onion

LEON’s popular Baked Fries might seem safe, but they contain:

  • Garlic Powder
  • Onion Powder
  • Various spices

This is listed in their “Foodie Fact Sheet” - so even seemingly simple items can be triggers.

The “Foodie Fact Sheet”

LEON provides a detailed ingredient document called the “Foodie Fact Sheet” that lists every ingredient in their dishes with allergens marked in bold.

How to access it:

Always check this before ordering, as LEON occasionally changes recipes.

What Works at LEON

Proteins (Heavily Modified)

ProteinStandard OrderFODMAP Order
ChickenWith marinade”Plain, no marinade”
SalmonWith glaze”Plain, no glaze”
EggsVarious styles”Plain poached/scrambled”

Important: LEON’s standard preparations include marinades with garlic/onion. You must specifically request plain cooking.

Rice

Plain rice (white or brown) is available and safe when ordered without:

  • Sauces
  • Toppings
  • Seasonings

Vegetables

Request steamed vegetables with no sauce or seasoning. Standard LEON vegetable preparations often include seasonings with onion/garlic.

What Doesn’t Work

Baked Fries - NOT Safe

Despite being a simple-sounding item, LEON Baked Fries contain:

  • Maize Flour
  • Rice Flour
  • Garlic Powder
  • Onion Powder
  • Various spices

These are coated before baking, so you cannot request them plain.

Sauces - All Avoid

SauceStatusWhy
Aioli❌ AvoidContains garlic
Chilli sauce❌ AvoidContains garlic
Harissa❌ AvoidMay contain onion
Most dressings❌ AvoidGarlic/onion base

Wraps and Breads

All contain wheat:

  • Tortilla wraps ❌
  • Pitta ❌
  • Bread items ❌

How to Order

Be very specific at LEON:

“I need to avoid garlic and onion completely. Can I have plain grilled chicken with no marinade, plain rice with no sauce, and steamed vegetables with nothing on them?”

If staff seem unsure, ask:

“Can you check the Foodie Fact Sheet for me? I need to see the exact ingredients.”

Breakfast Options

LEON breakfast can be navigated:

Potentially Safe:

  • Poached eggs (plain)
  • Scrambled eggs (check for additions)
  • Bacon (check seasoning)

Avoid:

  • Hash browns (check ingredients)
  • Beans (often have onion)
  • Toast (wheat)
  • Full cooked breakfasts with sauces

Drinks

Safe:

  • Black coffee
  • Tea (plain)
  • Water

Avoid:

  • Smoothies (often contain high FODMAP fruits)
  • Juices (check ingredients)
  • Anything with honey (large amounts)

Realistic Assessment

LEON is moderately challenging for FODMAP dieters because:

  1. Their “healthy” seasoning often includes garlic/onion
  2. Even simple items like fries have hidden triggers
  3. You’ll need to order everything plain

However, they do have a transparent ingredient policy, which helps.

LEON vs Other Options

AspectLEONAlternatives
Ingredient transparencyExcellentVaries
Hidden onion/garlicCommonCommon
CustomizationGoodVaries
Staff knowledgeGoodVaries

Similar Restaurant Guides

Looking for more UK options?


Last verified: January 2025. Menu items and ingredients can change. Always check the Foodie Fact Sheet on your visit.