Pour the water in the bottom of a large roasting pan. Place the ham, fat side up, into the roaster, then cover with aluminum foil.
Roast in the oven approximately 30 minutes per pound, r until the roast reaches temperature of 145 °F. Remove from the oven.
Brown Sugar Glaze
Combine the ingredients in a small sauce pan. Bring to a low simmer over medium-high heat, stirring constantly. Simmer for a minute, then remove from the heat.
Discard the aluminum foil. You can remove the rind at this point, or leave it on. Score the top of the ham with knife, through the fat layer.
Brush 1/2 of the glaze onto the ham, making sure to get glaze into the cuts.
Increase the oven temperature to 400 °F. Place the ham back into the oven and bake for another 15 minutes, Brush the ham again with the remaining glaze and return to the oven. Bake another 10-15 minutes then remove the ham.
Slice and serve.
Notes
Leaving the rind on while cooking helps keep the ham moist. The fat will melt under the rind instead of crisping up and drying out and will baste the ham will cooking.
When basting with the glaze, you can always remove the rind before basting, we always leave it on and just make sure to slice through to the meat layer.