Cauliflower Melt

Name: Cauliflower Melt
Prep time: 30 min
Cook time: 30 min
Total time: 1 h
Cuisine: American
Ingredients: 1 head cauliflower; 1/4 cup extra-virgin olive oil; 2 teaspoons mustard powder; 2 teaspoons smoked paprika; Kosher salt and freshly ground pepper; Kosher salt and freshly ground pepper; 1/4 cup yellow mustard; Kosher salt and freshly ground pepper; 1 tablespoon stone-ground mustard; 1 tablespoon honey; Kosher salt and freshly ground pepper; 4 tablespoons salted butter, at room temperature; 8 slices sourdough bread; 8 ounces butterkase or gruyere cheese, shredded; 2 pears, thinly sliced