Lobster-Cognac Pot Pie with Brioche Crust

+ 4 tablespoons butter

shallots, finely chopped

cognac

all purpose flour

seafood or vegetable stock

milk

heavy cream

salt & pepper,

The meat of 2 cooked lobsters, chopped into large pieces

asparagus stems, steamed and cut into 1” pieces

of a brioche loaf, cubed