In large pot, heat 1 Tbsp olive oil over medium heat. Sauté onion until soft, about 5 minutes, then add garlic and cook for another 1 minute. Add cauliflower, white beans, nutmeg, broth, almond milk, salt, and pepper. Bring to a boil, reduce heat, and simmer for 20 to 25 minutes, until cauliflower is tender.