I suspect that there would be wooden plates and/or bowls, but that they’d be communal piecesx, with everyone dipping into the same bowl. The level of technology required isn’t high – American Indians, without the same level of technology the Europeans you’re talking about had, had and used wooden bowls. There are plenty of examples in museums.
As noted above, knives were the common utensil. Spoons are easily made, although you can simply drink your soup out of a bowkl. Again, Big spoons (ladles) were around, and used as a communal resource. You can make them out of many materials, especially horn.
Jea Anouilh, in his play Becket, set during the reign of Henry II, has an interesting interchsange between Henry and Thomas Becket, who has just started using the new forks:
Becket: They’re a devilish new instrument. They’re for pronging food into your mouth.
Henry: But that gets the fork dirty.
Becket: Yes, but it’s washable.
Henry: So are the fingers. I don’t see the point.
Becket: It hasn’t one your Grace, but it’s very un-E nglish.
Later on, Henry comes back in and proudly announces: “Thomas, my barons have discovered what forks are good for! They’re for pronging each other’s eyes out!” In the Richard Burton/Peter O’Toole film they even show a couple of barons going after eaxch other with the forks.
I wouldn’t take Anouilh’s play as gospel on the history of eating utensils in England (or on anything else, for that matter), but it does give an idea of what the i ntroduction of genteel diningware must’ve looked like.