Madrid: Christmas Dinner 25th December?

Does anyone know where I could take someone in Madrid for a Christmas dinner on Christmas day? They are coming to Madrid so that I won't be alone at Christmas, and I can't make them a Christmas dinner as I don't have an oven-I could do it if necessary, but microwaved food not fantastic - so would like to take them somewhere nice for a Christmas dinner.

Somewhere nice, eh? How NICE is NICE? Someplace like Lhardy or someplace like Marisquería Ribeira do Miño? The former is more formal but the latter is just delicious. What is your price point?

Saludos, MadridMan

I agree on the Ribeira do Miño ,excellent place, and wont break your bank.

La Gloria de Montera on Calle Montera (M/gran via) or La Finca de Susana (or Suzanna?) (m/ sevilla?). Same ownership. Both are great and inexpensive (in my opinion), but not sure if they will be open for Christmas (I think they will be though).