Slow Cooker Poppy Seed Ham and Cheese Slider Filling Step-by-step instructions

Before you start

Before you begin, ensure your slow cooker insert is clean and dry. Gather all your ingredients so they are measured and ready to go. If using a block of Swiss cheese, grate it fresh, as pre-shredded cheese often contains additives that can affect how it melts.

Have your poppy seeds and Dijon mustard measured out in small bowls to make the assembly process quick and efficient. Having everything prepped in advance ensures that you can layer the ingredients seamlessly without any interruptions.

Instructions

Layering the ingredients

1. 1Layer the ham
   Place the thinly sliced deli ham into the bottom of the slow cooker, ensuring the slices are folded to create texture and volume.
   Look for The bottom of the slow cooker is evenly covered with folded ham layers.
   Tip Folding the ham instead of laying it flat helps the filling stay fluffy and prevents it from becoming a dense brick.

At this phase, the slow cooker should be filled with folded ham, topped with a generous layer of shredded Swiss cheese and a sprinkle of poppy seeds. The layers should be neat and even, providing a solid foundation for the sauce. Ensure the ham is distributed across the entire base to avoid any dry spots. Once the cheese and seeds are added, you are ready to introduce the liquid component for the next phase.

Incorporating the sauce

2. 2Add cheese and seeds
   Evenly distribute the shredded Swiss cheese over the ham layer, then sprinkle the poppy seeds over the top of the cheese.
   Look for The ham is completely covered by a layer of shredded cheese and poppy seeds.
   Tip Use a high-quality Swiss cheese for the best melt and flavor profile.

The sauce phase involves pouring the whisked Dijon butter mixture over the cheese. The liquid should coat the cheese and seep down into the ham layers. You should see the butter and mustard creating a glossy, golden layer. After pouring, ensure the lid is properly secured to trap the heat and moisture. At this point, the slow cooker is ready to begin the low-heat cooking process that will unify all the flavors.

Slow cooking completion

3. 3Prepare and add sauce
   In a small bowl, whisk together the melted butter and Dijon mustard until smooth. Pour this mixture over the cheese and ham. Cover the slow cooker and cook on low for 2 hours.
   Look for The cheese is melted and bubbly, and the sauce has incorporated with the ham.
   Tip Ensure the butter is warm but not hot when mixing with the mustard to maintain a smooth consistency.

After two hours of cooking, the filling will be aromatic and the cheese will be fully melted into a creamy, cohesive mass. The sauce will have thickened slightly and coated the ham beautifully. The poppy seeds should be well-distributed throughout the mixture.

Before serving, give the filling a very gentle stir just to combine the components, being careful not to shred the ham too much. The texture should be soft, melty, and ready to be spooned onto rolls.

Common mistakes

Avoid overcooking the ham, as it can lose its delicate texture if left for too long. Stick to the recommended two-hour timeframe on low to maintain the best quality. Another common mistake is using too much mustard; the ratio provided is designed to provide a zesty kick without overpowering the other ingredients.

Finally, do not stir the mixture during the cooking process. The layering technique is crucial for the final texture, and stirring too early can break down the ham slices prematurely.

How to tell it’s done

The filling is done when the Swiss cheese is completely melted and bubbling, and the Dijon butter sauce has formed a cohesive, aromatic glaze over the ham. The ham should be heated through and extremely tender, having absorbed the flavors of the mustard and poppy seeds.

There is no specific internal temperature required for the ham as it is already cooked, but ensure the entire mixture reaches a hot, serving temperature throughout, which typically happens after two hours on the low setting.