Use a variation on the mediaeval trenchour; a hollowed out bread roll style thing. You may get a small amount of bean leakage but if youre careful you should be able to manage with no hands.
I believe a hollowed out bluma would also accommodate this, however you may find your mouth cant open enough to insert.
FWIW: Bacon + egg + sausage + mushrooms = WIN
No sauces! (bunch of flaming heretics...)