In a medium-sized bowl, mix together the tomatoes, basil, and garlic. Add the olive oil, balsamic vinegar, and lemon juice. Season with salt and pepper, to taste, and mix. Carefully toss in the feta cheese and set aside.
Brush olive oil on both sides of each slice of bread and toast until the edges are crisp. To assemble, use a fork to lift the tomato-basil mixture and place on top of toasted slices. Top with fresh, crumbled feta and small basil leaves to garnish.