Pre-heat oven to 325°F (160°C). Using a fork, lift the membrane from a corner of the rib bones on the non-meaty underside, and gently peel it away from the ribs and discard. Place ribs in a single layer in a baking tray or dish, meaty side up. Add 2 cups (500 mL) of hot water to the tray. Slice lemons and place slices on top of ribs.