In a medium bowl, stir together the tomatoes, beet greens, raisins, shallot, 1 teaspoon of olive oil, vinegar, sea salt, and pepper until well combined. Stir in the feta and beets until just combined, then set aside. In a small bowl, stir together the ricotta and lemon zest until combined. Preheat the oven broiler on a low setting. Place the baguette slices on a large cookie sheet coated with nonstick cooking spray or parchment paper. Lightly brush the bread slices with the remaining 3 teaspoons of olive oil. Broil the bread for 1 to 2 minutes, or until golden brown. Evenly spread the ricotta mixture over the bread slices. Top with even amounts of the tomato–beet mixture. Evenly sprinkle basil over the bread slices and serve.