Broccoli cheddar soup

Ingredients

• 1/2 stick salted butter
• 1/4 large onion, diced
• 30g all-purpose flour
• 2 cups heavy cream
• 2 cups chicken broth
• 1 head broccoli, chopped into bite-size pieces
• 1 large carrot, julienned to 0.5"
• 1/4 tsp ground nutmeg
• 8 oz sharp cheddar, grated
• salt, to taste
• black pepper, to taste