Preheat & Prep
Preheat your oven to 180 °C (350 °F). Lightly grease a 9×13‑inch baking dish or a similar sized casserole.

Arrange the Ham and Pineapple
Spread the diced cooked ham evenly across the bottom of the prepared dish. Scatter the drained pineapple chunks over the ham, distributing them uniformly. Set aside the reserved ¼ cup of pineapple juice for the glaze.

Prepare the Glaze
In a small mixing bowl, whisk together the ½ cup brown sugar, ¼ cup reserved pineapple juice, 1 tablespoon Dijon mustard, 1 tablespoon apple cider vinegar, and ¼ teaspoon ground cloves (if using). Whisk until smooth and well combined—the glaze should be pourable but slightly thick.

Glaze the Bake
Slowly pour the glaze over the ham and pineapple, ensuring even coverage. Use a spatula or the back of a spoon to gently spread the glaze to the edges.

Bake
Place in the preheated oven and bake for 25–30 minutes, or until the glaze is bubbly and slightly caramelized around the edges. Watch carefully toward the end to avoid excessive browning.

Rest & Serve
Remove from the oven and let the bake rest for 5 minutes to allow the glaze to set slightly. Serve warm, spooning some of the glaze over each portion.