- Pack the red onions and jalapeños in a jar or glass dish. Mix the lime juice, honey, and salt in a measuring cup and pour over the onions and jalapeños. Cover and refrigerate for at least 1 hour (can be made up to 3 days ahead). 
- Prepare a hot grill. Rub the ears of corn with olive oil, sprinkle with salt and pepper, and grill, turning occasionally, until they’re bright gold with a little bit of char. Allow them to cool, then slice the kernels from the cob. 
- Toss the corn with tomatoes, avocados, and as many of the pickled red onions and jalapeños as you like, along with a few tablespoons of the pickling juice. Use up the rest on salads and tacos. 
- Top the salad with queso fresco and cilantro, and season with a bit more salt and pepper to taste