Cover and cook the frozen beans in boiling salted water for about 12 minutes. Peel onion and garlic, dice finely. Wash and finely dice the tomatoes.
Heat 2 tablespoons of oil in a saucepan. Sauté onion and garlic in it. Stir in the tomato paste, sweat briefly. Add tomatoes, simmer for about 3 minutes. Drain the beans. Add to the tomatoes, braise for another 5 minutes.
Season with salt, pepper and 1 pinch of sugar.
For the dip, mix 2 tablespoons of harissa and crème fraîche. For the breading, chop half the nuts coarsely, grind the rest finely in the universal chopper. Mix all nuts and breadcrumbs. For the egg milk, whisk eggs, 1 tbsp. harissa and milk.
Dab schnitzel dry, cut into 3-4 pieces. Season with salt and pepper. Prepare schnitzel, bread it and fry it. Arrange everything. Serve with flatbread.