Eggs Benedict Strata

Name: Eggs Benedict Strata
Ingredients: 6 English muffins, split and cut in half; 12 large eggs; 2 c. whole milk; 1/2 c. half-and-half; 1 tsp. kosher salt, plus more to taste; 1/2 tsp. black pepper; 1 tbsp. olive oil; 8 oz. Canadian bacon sliced, quartered; 1 10-ounce package baby spinach; Salted butter, for the pan; 2 1/2 c. grated white cheddar cheese (about 8 ounces); 1 1/2 sticks (12 tbsp.) salted butter; 3 large egg yolks; Juice of 1/2 lemon; 1/4 tsp. kosher salt; 1/4 tsp. black pepper; A few dashes of hot sauce