1: Preheat the oven to 390°F (200°C). Slice 1 baguette fairly thinly and spread with pesto. Arrange the slices as you go on a baking sheet lined with a sheet of cooking parchment.
2: Add a thin slice of cooked Morteau sausage to each.
3: Then half a slice of hard-boiled egg.
4: Top with a sliver of smoked cheese.
5: Bake for 15-20 minutes, just until the cheese melts. Serve hot or warm.
Remarks
If you don't have spinach and pistachio pesto, classic pesto will still work fine. You can use a different smoked sausage (Molène, Montbéliard,...) instead of Morteau.