In a large bowl, whisk together the kefir, curry paste, garlic, ginger and salt.
Add chicken breasts and turn to coat. Cover, refrigerate and marinate for at least 2 hours and up to 8 hours.
Preheat the grill to medium-high. Lightly oil the grill. Cook the chicken until it is just cooked through, 4 to 5 minutes per side. Let the chicken rest for a few minutes before slicing.
The Salsa:
Cut the kernels off of the corn and place in a medium bowl. Add the diced red bell pepper and minced hot pepper to the bowl. Stir in the extra-virgin olive oil and season with salt and pepper to taste. Gently stir in the chopped cilantro.
Slice the chicken on the diagonal and serve with the corn salsa.