Promised Land CSA » Beet, mushroom and potato casserole

Ingredients

• 2 tbsp oil
• 1 medium onion, chopped
• 3 tbsp flour
• 1 1/4 cups vegetable stock
• 1 1/2 pounds cooked beets, peeled and chopped
• 5 tbsp light cream
• 2 tbsp creamed horseradish
• 1 tsp hot mustard
• 1 tbsp wine vinegar
• 1 tsp caraway seeds
• 2 tbsp butter
• 1 shallot, chopped
• 8 ounces mushrooms, trimmed and sliced
• 3 tbsp chopped fresh parsley
• 2 pounds potatoes, peeled
• 2/3 cup milk
• 1 tbsp chopped fresh dill
• salt and freshly ground black pepper