How to Make It
In a large skillet, heat the olive oil. Add the diced tomatoes, minced jalapeños, diced onion and a large pinch of salt and cook over moderately high heat, stirring often, until softened, about 5 minutes. Pour in the tequila and cook, stirring frequently, until the skillet looks nearly dry, about 2 minutes.
Reduce the heat to low. Add the cheese and cook, stirring constantly, until fully melted, about 30 seconds. Quickly transfer the queso fundido to a serving bowl. Sprinkle with the cilantro and serve immediately, with tortillas or chips.