Place 3/4 cup of the buttermilk in a shallow bowl.
In a separate bowl, combine the cornmeal, 1 teaspoon salt, and 1/4 teaspoon pepper. Dip the chicken in the buttermilk (letting any excess drip off), then the cornmeal, pressing gently to help it adhere.
Heat 3 tablespoons of the oil in a large skillet over medium-high heat. Cook half the chicken until golden and cooked through, 2 to 3 minutes per side. Wipe out the skillet. Repeat with the remaining oil and chicken.
In a small bowl, whisk together the sour cream, honey, the remaining 1/4 cup of buttermilk, and 1/4 teaspoon salt. In a large bowl, toss the lettuce and bell pepper with the dressing. Serve with the chicken.
Tip: Take this meal on the go: Slice the chicken and wrap it up in a large tortilla with the lettuce, bell pepper, and dressing.