Preheat oven to 375°F.
Mix half-and-half, eggs and flour until smooth.
Remove the chiles from one of the cans, split and de-seed them.
Lay the chiles flat on the bottom of a 7” x 11” pan.
Top with 1/3 of the cheese and then 1/3 of the half-and-half mixture. Repeat another two times.
Pour tomato sauce on top.
Bake for 1 hour.
Let cool 5-10 minutes before serving.