The recipe below that has 4 C of milk turns out more like a crust-less quiche.
7 eggs4 C milk (used unsweetened soy milk and it still worked)2 C bisquick1 Tbsp garlic powder3 C chopped ham4 C of a Mexican blend of cheeses (or your own combo of cheddar and jack cheeses)½ C onion
Stir the liquid ingredients in a large bowl. Then add the bisquick. Stir in the rest. Pour into 2 lightly greased 9x13x2" pans and bake at 425 degrees for 10-15 minutes. Switch pans on the shelves and bake an additional 20 minutes.
Serves 10-12, from Judy Wang