Baked Eggs With Beans and Greens

olive oil

sweet or spicy Italian sausage, casings removed (optional)

medium yellow onion, thinly sliced

chickpeas or white beans, drained and rinsed

garlic cloves, finely chopped

Kosher salt

whole tomatoes, gently crushed by hand

stemmed and packed roughly chopped greens such as spinach, kale or Swiss chard

large eggs

Black pepper

mixed herbs, such as Italian parsley and basil, for garnish

Grated cheese, such as pecorino or Parmesan, for serving (optional)