(and why Abi’s Diner in Bangkok proved it for 37 years)

Why Thai Somtam Belongs on a Cheeseburger

(and why Abi’s Diner in Bangkok proved it for 37 years)

You think you know what a cheeseburger is allowed to be. Beef, American cheese, maybe some lettuce, onion, special sauce. Safe. Predictable. Mid-century American scripture.

Then you walk into a baby-blue shophouse on Soi Sukhumvit 38 at 3 a.m., still half-drunk on Sangsom and regret, and Abi slides a plate across the counter that rewires your entire understanding of the form.

It looks like a normal smash burger at first: two paper-thin patties, crispy lace edges, melted cheese, steamed Martin’s potato roll. But the shredded green papaya is spilling out the sides like it’s trying to escape. There’s a violent red smear of jaew chili relish under the top bun. A fistful of long beans sticks out like antennae. And the whole thing smells unmistakably of fish sauce, lime, and roasted peanuts.

This is the Somtam Cheeseburger, and it has no right to be this good.

The logic is actually airtight once you taste it

1. TextureClassic cheeseburger toppings are soft and wet. Somtam is aggressively crunchy: green papaya cut into needle-thin strips, raw long beans, cherry tomatoes that explode. That crunch is the same reason people love pickles on a burger, except it’s turned up to eleven and it never gets soggy.
2. AcidAmerican burgers lean on ketchup and mild pickle brine. Somtam brings fresh lime juice and tamarind—sharper, brighter, and it cuts straight through the beef fat like a machete.
3. FunkCheeseburgers flirt with funk via American cheese and grilled onions. Somtam brings pla raa (fermented fish sauce) and dried shrimp. Same umami family, just wearing louder cologne.
4. HeatMost burger joints offer jalapeños as an afterthought. Somtam’s prik kee noo chiles are smaller, meaner, and evenly distributed. One bite in the middle, one bite on the edge—every mouthful keeps you honest.
5. Salt & SugarPalm sugar in the dressing balances the salt of fish sauce and the beef. It’s the same trick In-N-Out does with their spread, except the sweetness here is caramel-funky instead of just corn-syrup sweet.

Abi didn’t invent it to be clever. He invented it to survive.

Back in the late 90s, ingredients were running low after a long night. The papaya salad lady next door had shut down, but her leftover somtam was still sitting in the mortar. Abi, hungover and stubborn, threw a handful on a burger instead of lettuce “just to use it up.” The taxi drivers waiting for their pancakes went quiet for ten full seconds, then started yelling for another round. By the next week it was on the chalkboard in pink marker: “Somtam Burger – eat and cry” – 80 baht

It stayed there until the day the bulldozers came in 2024.

The final, perfect version (late-period Abi, circa 2019)

• Two 2-oz wagyu-beef-blend patties smashed thin on a 500 °F griddle
• Two slices of American cheese (yes, the plastic-wrapped kind—he refused to change)
• Martin’s potato roll, steamed on the onions
• Bottom bun slathered with jaew (roasted-chili relish)
• Pile of classic Isaan somtam (green papaya, tomatoes, long beans, peanuts, lime, fish sauce, palm sugar—no carrots, no compromise)
• Top bun gets a thin swipe of Japanese Kewpie for creaminess
• Served wrapped in wax paper so your hands smell like fish sauce and fryer oil for the rest of the night

You take one bite and you understand: this isn’t fusion. It’s evolution.

The verdict

A plain cheeseburger is comfort food. A somtam cheeseburger is a religious experience that leaves your lips swollen and your soul temporarily at peace.

Abi is retired now. The condo tower is up. The griddle is cold. But somewhere in Bangkok tonight, a cook who used to wash dishes for Abi is smashing patties in a different alley, and if you’re lucky, really lucky, you’ll find one that still puts somtam on a cheeseburger.

Order it. Cry a little. Tell a lie at the counter if there’s a Liars’ Booth.

The ghosts will understand.

Skyway Diner says: Abi was right. Thai somtam absolutely belongs on a cheeseburger. Fight me.

(originally served 1992–2001 at Abi’s Diner, Soi Sukhumvit 38, Thong Lor, Bangkok. Gone but never forgotten.)