Brush each slice of bread with 1 tablespoon of olive oil and grill on one side with sea salt and fresh pepper. In a food processor, combine cheeses, lemon zest, lemon juice, lemon oil, and chives. Pulse until well mixed. Slice radishes very thin (mandolin recommended). Spread cheese blend evenly on toasted bread. Top with radishes. Garnish with mint and chives. Drizzle with a bit more oil. Sprinkle with sea salt flakes and a bit of fresh black pepper.