Heat the grill to medium.
Cut the red onion in wedges so that some of the core is left intact. This will hold the pieces together while you grill them so they don’t fall apart.
½ red onion
Grill the onion until soft but not charred, flipping several times (about 10 minutes in total).
Lay the corn on the grill and grill the corn all over until soft but not charred (about 10 minutes in total, turning every few minutes).
3 ears corn
Core the pepper and cut in several pieces, grill on both sides until soft but not charred, about 4 minutes a side.
1 red bell pepper
Let the veggies cool. Stand the corn up on one end and slice the niblets off the cob, and place in a large mixing bowl.
Cut the onions off the core and dice. Cut the peppers into bite size pieces. Add the onions and peppers to the bowl with the corn. Remove ends from the green onions and dice the remainder.
2 stalks green onion
Add the beans, green onion, tomatoes, cilantro, jalapeno, cheese, oregano and salt to the bowl, and mix everything together.
1 19 oz black beans, 12 cherry tomato, ½ cup cilantro, ½ jalapeno, 4 oz feta cheese, 1 tsp oregano, ½ tsp salt
Drizzle mixture with lime and olive oil, and toss to mix.
3 tbsp lime juice, 4 tbsp olive oil
Serve right away or let sit for several hours.