Step 1

In a small saucepan, combine the brown sugar, honey, orange marmalade jam, coarse mustard, and spicy brown mustard.

Step 2

Cook over medium low heat, while whisking, until the sugar has dissolved.

Step 3

Remove from heat.

Step 4

Place the spiral sliced ham inside the crock of a large slow cooker (or electric roaster).

Step 5

Using a pastry brush, baste the ham on all sides, making sure to pour some of the glaze in between the layers.

Step 6

Place the lid on the slow cooker and cook on low heat for 6 - 8 hours, basting every 2 hours if desired.

Step 7

After the ham has cooked for 6 - 8 hours, remove it from the slow cooker and transfer it to an oven safe platter.

Step 8

Preheat the broiler.

Step 9

Remove 1 cup of the cooking liquid from the slow cooker and transfer it to a small saucepan.

Step 10

Bring to a simmer over medium heat and let simmer for 5 minutes.

Step 11

Whisk in the cornstarch, 1 teaspoon at a time, until desired thickness is achieved.

Step 12

Then, brush the thickened glaze over the outside of the ham and in between the layers.

Step 13

Place the oven safe ham in the oven on the second to lowest rack.

Step 14

Cook under the broiler and broil for 5 - 10 minutes, or until the glaze is thick and shiny.

Step 15

Remove from the oven and serve.