Preheat oven to 170 degrees Celsius.
Place the pork neck in a baking dish. Season with mustard powder, garlic powder, smoked salt, and a drizzle of olive oil. Bake for 60 minutes.
While the pork is cooking, prepare the sweet mustard glaze by combining the mustard, mayonnaise, and lemon juice in a bowl. Mix until smooth.
After 60 minutes, remove the pork from the oven. Slice it into thin strips and return to the baking dish. Pour the sweet mustard glaze over the pork strips and bake for an additional 15 minutes.
In a separate pan, cook the bacon or pork belly until crispy. Set aside on paper towels to drain excess fat.
Heat a tablespoon of olive oil in a pan and fry the nectarine halves until golden and slightly caramelized. If using halloumi, grill it in the same pan until golden on both sides.
Assemble the salad by arranging the mixed leaves on a large serving platter. Layer with the grilled nectarines, halved tomatoes, sliced red onion, glazed pork slices, halloumi, burrata, and crispy bacon pieces.
Scatter fresh basil leaves over the top. Drizzle with olive oil and balsamic glaze. Season with a pinch of salt and freshly ground black pepper.