Peel and quarter the pineapple and cut out the stalk. Cut the flesh into thin slices. Grate Emmental finely. Clean the chilli, cut lengthwise, remove seeds, wash and chop finely. Melt butter in a small pot. Stir in chilli and remove from the heat.
Preheat oven (electric cooker: 200 °C/circulating air: 180 °C/gas: see manufacturer). Line baking tray with baking paper. Cut baguettes crosswise at a distance of 2-3 cm in a wedge shape. Fill each gap with pineapple and plucked ham. Place baguettes on the baking tray and sprinkle with cheese. Drizzle half of the chilli butter over them.
Bake in a hot oven for 10-15 minutes. In the meantime, clean and wash the spring onions and cut them into fine rings. After half of the baking time, drizzle the rest of the chilli butter over them. Remove from the oven, drizzle with chilli sauce and sprinkle with spring onions.
Toast the pieces cut from the baguette in the oven and make breadcrumbs. Sprinkle this over the bread, for example with the spring onions.