2 medium shallots, finely sliced
1/2 cup grapeseed oil, plus more for pan
1 Bosc pear, cored (3/4 diced and 1/4 thinly sliced, for garnish
2 tablespoons verjus or 1/2 lemon, juiced
2 tablespoons honey
Kosher salt and freshly ground black pepper
1 bunch kale
1 bunch rainbow chard
1 bunch beet greens
1/2 cup grated Parmigiano-Reggiano
1 cup toasted walnut pieces