Symbolism? What about communion and eating Christ?
I prefer lamb simply roasted. Leg of lamb is best.
Lamb can be get sour, I'm not so keen on it in a stew.
You mentioned mint sauce as a lamb accompanient above, I had no idea you'd never had it.
The thing is that it is supposed to be sharp to counter the fat and virtually all commercial sauces are so sweet you could have them with ice-cream, And mint jelly is an abomination

Made fresh -- mint grows like a weed and spreads fast -- you need the right variety, there are so many ...
This is how my mum made it: strip off the young vivid green leaves at the tips, you'll need a lot. Sprinkle some granulated sugar (to give a grip) on a chopping board and chop leaves very very finely, crushing some with side of knife to a paste (suppose you could do this with mortar and pestle). Put in a small steep sided dish (I use a ramekin), pour on some boiling water and let steep. Then when cool, add some wine vinegar so you have a thick green sauce, and leave to steep.
The sauce should have a bite from the vinegar, but not too much so adjust the amount of water/vinegar. And if its really too sour add a littel sweetening to taste (I never do).
I'm lazy: these days I buy jars of chopped mint (made by Colmans of mustard fame) and add water/vinegar.