2 tsp. lemon zest
⅓ cup pepperoni slices (1 ounce)
1½ cups shredded fontina cheese
1 tbsp. minced garlic
1 pound pizza dough, preferably whole-wheat
¼ tsp. ground pepper
¼ tsp. salt
¾ cup sliced shallots
4 cups thinly sliced Brussels sprouts
4 tbsp. extra-virgin olive oil, divided