1.Preheat oven to moderate, 180°C (160°C fan-forced).
2.Place tomato, cut side up, in a roasting pan. Whisk half the oil with vinegar and garlic; drizzle over tomato. Bake 20-25 minutes, or until tender. Remove from oven; cool slightly.
3.Meanwhile, combine feta, ricotta and half the zest in a small bowl. Combine lentils, artichoke and basil in a large bowl.
4.Brush bread with remaining oil. Bake 5 minutes, or until golden brown. Remove from oven; cool slightly. Spread bread with feta mixture.
5.Add tomato and pan juices to lentil mixture. Season with salt; toss to combine.
6.Spoon into shallow serving bowls; top with olives. Serve with feta toast.