In a mixing bowl, combine the above ingredients and mix well. Season with salt and pepper to taste, set aside.
Mix together the beets, cheeses and cilantro and season with salt and pepper to taste. Stuff each pepper with approximately 3 tablespoons of the mixture. Batter lightly and dredge in the cornmeal. In a large frying pan, heat the oil to 370 degrees F. Fry the peppers in batches, turning until lightly brown, about 4 minutes. Drain briefly on paper towels. Serve hot with vegetables tossed in balsamic vinaigrette.
Whisk together the vinegar and mustard in a small bowl. Slowly drizzle in the olive oil and season with salt and pepper to taste.