Been twice to the Lion's Den (great views too) and loved it, I think they do a Sunday something. I've also heard great things about Elacoya Grill in Gilford too.
If you are going through Meredith to Rt. 25 to Tamworth, I think Largo in Meredith has a brunch, I know that Church Landing does a wonderful brunch buffet but might be pricier"
you can't beat the breakfast in Moultonboro at Village Kitchen (but not a brunch) on rt 25.
or in Meredith at George's Diner both are excellent values, excellent food.