Cook corn and let cool. Remove corn from the cob using a knife.
Combine lime juice, lime zest, agave nectar, garlic, cumin, salt and pepper in a small bowl. Pour in olive oil in a steady stream while whisking, until combined.
In a large bowl, combine rice, corn, black beans, red pepper, scallions, cilantro and jalapeno pepper and lime vinaigrette. Let sit for about an hour so the flavors can blend.
Just before serving carefully fold in avocado pieces. Mix well to combine.
Serve cold or at room temperature.
Notes
Cooking Corn on the Cob: An easy way to prepare corn on the cob (especially if you are only cooking a few ears): Shuck each ear of corn. Wrap each ear of corn in wax paper. Place in microwave. Cook on high – 2 minutes for each ear of corn. (2 ears – 4 mins, 3 ears – 6 mins, etc.) Remove from microwave and open carefully.