Combine first 10 ingredients in a bowl; toss gently to combine. Cover and chill 2 hours.
Combine 3 tablespoons olive oil, garlic, and salt. Place bread slices on a baking sheet, and brush evenly with olive oil mixture. Bake at 350° for 12 minutes or until toasted; cool.
Top each toast evenly with avocado mixture. Sprinkle with cilantro before serving.