Start the rice cooker, and preheat the oven to 200C/400F.
Combine tomatoes, tomato paste, olive oil, shallots, garlic, dried mixed herbs, and salt and pepper in a high-walled, oven-safe container. Mix well.
Lay fish filets on top of the tomato sauce, season, and bake for 10 minutes or until the fish starts to flake.
Remove the cooked filets and reserve. Lay in the next batch of raw fish, season and bake.
While the fish is cooking, wash and cut the beans. Blanche beans in salted water, then drain.
Sauté beans in olive oil. When done to your liking, switch off the heat, stir in finely minced garlic and a squeeze of lemon juice.
Combine and serve.