Method
- Start by prepping your brioche buns, cheddar, mayonnaise so the cooking goes quickly.
- Set a wide pan over medium heat and sweat the yellow onion in a little butter until translucent.
- Turn the heat up, add the smash, and cook until deeply browned and aromatic.
- Fold in the cheddar and season generously; give everything a minute to come together.
- Pour in the vegetable stock, bring to a gentle simmer, and cook until thickened and glossy.
- Taste and adjust, then finish with flaky sea salt right before serving.
- Plate it up while hot and pass extra at the table.
Cooked this one? Ratings and notes help other members — this recipe is currently rated
4.5 from 98 cooks.