Make the cheese sauce simply combining all the ingredients to a pirex bowl, give them a thorough blend and cook in the microwave for a couple of minutes.

Wilt the spinach for 2 minutes in the microwave.

For the spinach and cheese insert simply cut a piece of clinging film and arrange it on the table or your working surface. Create a layer of wilted spinach making sure to overlap the leaves. Add a layer of cheese sauce in the center of the spinach one. Carefully wrap the spinach layer around the cheese sauce with the help of the film, seal the edges and gently roll it on the table to create a sausage. Place in the freezer to firm up for at least half an hour.

Place the burger patties on another film sheet or baking paper. Flat them until they are 4-5 mm thick and all stuck together. Take the spinach and cheese insert from the freezer and place it in the middle of the burger layer. 

Gently wrap the burger patties around the insert, making sure to fill all the holes (use a bit of water to wet your hands to work the paste easily). Chill the loaf in the freezer for a few minutes if it's too soft.

Coat the loaf with bread crumbs to add a bit of a crunch.

Preheat the oven at 200°C (390°F) and bake the meatfree loaf for 20 to 30 minutes, until golden brown and firm.

Serve it straight away with your favourite choice of veggies or sides.