Heat about a teaspoon of olive oil in a skillet over medium-high heat. When hot, add the corn, and spread it into one layer. Let it sit, untouched, for about 5 minutes, or until the corn is warm and just starts to brown. Place the corn into a bowl and drizzle it with a little bit more olive oil. Toss in the cucumber, herbs, feta, pepper and red pepper if using. Serve warm or at room temperature.