I made a half recipe of the lemon & ricotta cake from Diana Henry's Simple. The recipe is available online here.
After doing the appropriate geometry calculations, I determined a 6-inch springform pan would be pretty close to half the surface area of an 8-inch pan. I got distracted and feared it was way over-baked due to the browning but after cutting a slice, it's still very soft and moist inside. If I do it again, I may drop the oven temp a bit. I used limes instead of lemons because my lime tree is loaded with fruit. Served with blackberries, candied lime peel and a wee glass of homemade limoncello (also made from limes)
Very nice and not too sweet!