Place 1 ½ tablespoons of the canola oil in each of 2 medium-size nonstick skillets, and heat over medium-high. Divide okra between skillets, and stir to coat. Cover and cook, stirring occasionally, until bright green, about 10 minutes. Sprinkle okra in each skillet with ¾ teaspoon salt and ½ teaspoon black pepper. Divide yellow cornmeal and cayenne pepper evenly between skillets; stir to coat. Drizzle 1 ½ tablespoons oil over mixture in each skillet, and cook, uncovered, stirring occasionally, until okra is tender and browned, about 6 minutes.