The Ivy Market Grill is a cozy restaurant in the heart of Covent Garden, next to the Jubilee Market and Covent Garden Piazza. If you want a quiet dinner, this is a very good choice. The food was delicious during our visit and the service was great. Booking a table in advance is advisable, I did this through the Opentable app, part of Bookings.com. Very handy.
The prices are slightly higher than what I am used to in my area, but still very acceptable.