Wash and clean spring onions and cut into fine rings. Season sour cream with salt, pepper and paprika. Carefully roll bread slices a little flatter and place them on a baking tray lined with baking paper.
Spread with sour cream and sprinkle with ham and spring onions. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: see manufacturer) for 10-12 minutes.
Wash the rocket, shake dry and chop coarsely. Wash lettuce, drain well. Mix the rocket with the lettuce, except for something to garnish. Wash and halve the tomatoes. Peel and finely dice the shallot.
Whisk honey, vinegar, salt and pepper. Beat the oil in a thin stream. Stir in the shallot. Mix the salad with the vinaigrette. Remove the tarte flambée from the oven, cut in half diagonally and arrange on plates with the salad.
Sprinkle with rocket.