Quiche D'epinards Et Oignon

2 tablespoons finely minced shallots or 2 tablespoons green onions 2 tablespoons butter 1 1/4 cups chopped blanched spinach (drained) or 1 1/4 cups frozen[...]

6 eggs 8 ounces spinach leaves, chopped 1 cup cantal cheese (substitute Cheddar) 2/3 cup half-and-half 1/2 cup chopped white onion 1/2 cup cooked crumbled[...]