Globalseo is still translating this page...
Skip to main content

Charred Cos with Tomatillo Dressing

This vibrant charred romaine with tomatillo dressing brings a sophisticated, smoky edge to the classic green salad. By quickly searing the lettuce on a hot grill, you transform the crisp leaves, adding a mellow sweetness that pairs perfectly with the punchy, zesty dressing. The combination of charred poblano chillies and creamy avocado creates a wonderful contrast of textures, while the raw white onion provides a sharp, clean finish.

Serving as an impressive vegetarian starter or a light lunch, this dish celebrates fresh, seasonal produce with a nod to Mexican-inspired flavours. The use of Cotija cheese adds a lovely salty crumb, though crumble-firm feta makes an excellent substitute if you cannot find it. Packed with healthy fats and bright citrus notes, it is a refreshing way to elevate your salad repertoire for any garden party or midweek meal.

Video picks

Continue reading below

Ingredients for Charred Cos with Tomatillo Dressing

  • 1/4 medium white onion, quartered

  • 1 small tomatillo, husk removed

  • 1 jalapeño, sliced, seeds removed

  • 1 garlic clove

  • 1/4 avocado, chopped

  • 1/4 cup chopped fresh coriander leaves

  • 1/4 cup olive oil

  • 1 tablespoon fresh lime juice

  • Kosher salt

  • Freshly ground black pepper

  • 1 small poblano chilli

  • 2 heads of cos lettuce, outer leaves removed, halved lengthwise

  • 2 tablespoons olive oil

  • Kosher salt

  • 1 avocado, chopped

  • 1/4 medium white onion, finely chopped

  • 1 tablespoon fresh lime juice

  • 60g Cotija cheese, finely grated

  • 1 tablespoon chopped coriander stems

Bring onion, tomatillo, jalapeño, garlic, and 475ml water to a boil in a small saucepan. Reduce heat and simmer until onion is very tender, 6–8 minutes; let cool. Drain, reserving cooking liquid.

Purée onion mixture with avocado and coriander leaves in a blender. With motor running, gradually add oil and 2 tablespoons cooking liquid and blend until combined.

Add lime juice; season with salt and pepper.

Prepare grill for medium-high heat. Grill poblano, turning occasionally, until charred and blistered, 6–8 minutes. Let cool. Peel and finely chop.

Drizzle cut sides of cos with oil; season with salt. Grill, cut side down, until charred, about 3 minutes. Turn and grill just until warmed through, about 30 seconds.

Spoon dressing onto plates and top with cos, charred side up, avocado, onion, and poblano. Drizzle with lime juice; season lightly with salt. Scatter Cotija cheese and chopped coriander stems over.

Disclaimer

While every effort has been made to ensure the information is accurate and up to date, individual needs may vary and dietary requirements can differ based on personal health conditions. Always check food labels and allergen information before preparing or consuming any recipe. If you have specific health concerns, allergies, intolerances, or are following a medically prescribed diet, seek advice from your GP, pharmacist, or a registered dietitian before making significant changes to your diet or lifestyle.

Article history

The information on this page is peer reviewed by qualified clinicians.

  • 28 Jan 2026 | Originally published

    Authored by:

    UK recipe editors

    Peer reviewed by

    UK recipe editors
flu eligibility checker

Ask, share, connect.

Browse discussions, ask questions, and share experiences across hundreds of health topics.

symptom checker

Feeling unwell?

Assess your symptoms online for free

Sign up to the Patient newsletter

Your weekly dose of clear, trustworthy health advice - written to help you feel informed, confident and in control.

Please enter a valid email address

By subscribing you accept our Privacy Policy. You can unsubscribe at any time. We never sell your data.