This pizza is inspired by a favorite snack: toasted sourdough with funky blue cheese and homemade kumquat marmalade. If youve never tried it, do yourself a favor. Its almost delicious enough to justify making kumquat marmalade from scratch, which is equally incredible in both flavor and laboriousness. If you can find kumquat marmalade at the store, try it on this pizza; if not, orange is perfectly fine. The idea here is to balance the full range of flavors: sweet, bitter, salty, sour, and umami. The radicchio comes in to support the bitter note of the marmalade while also countering its sweetness. The turkey fennel sausage complements the savory blue cheese while standing up to its natural funk. And the bright citrus sourness breaks through the salt and fat in a pleasant and surprising way.