"You can't go wrong with these cheesy Creamed Brussels Sprouts from Delish.com...."
extra-virgin olive oil
large yellow onion, chopped
cloves garlic, minced
Brussels sprouts, halved and thinly sliced
red pepper flakes, plus more for garnish
Kosher salt
Freshly ground black pepper
Greek yogurt
mayonnaise
eggs, lightly beaten
Zest of 1/2 lemon
freshly shredded Fontina
freshly grated Parmesan, plus more for garnish
freshly chopped parsley
crushed red pepper flakes, for garnish