Green Bean Almond Casserole - Creamy Holiday Side Dish

Ingredients

• 450 g fresh green beans, trimmed and cut into 2-inch pieces
• 2 tbsp unsalted butter
• 2 cloves garlic, minced
• 1 small onion, finely diced
• 1 cup sliced mushrooms (optional)
• 2 tbsp all-purpose flour
• 1 cup vegetable broth
• 3/4 cup whole milk or half-and-half
• 1/2 cup grated Parmesan cheese (optional)
• 1/2 tsp salt
• 1/4 tsp black pepper
• 1/2 cup sliced almonds, toasted