For an attractive effect, you can cut open the poached eggs just before serving so that the yolk runs over the salad, or leave this for your guests to do themselves.
Remarks
Ideally, aim to keep some warmth to the salad by adding the lardons and croutons while they are still really hot, then serve immediately.
If you do find some young, tender dandelion leaves, lucky you! Try adding them to your salad instead of lettuce for an authentic taste of Lyon.